LinkUpCareers - Fake job offer by LinkUpCareers Consultancy and CATERPILLAR Company

My self Naveen K M living at Bangalore and I got a call from recruitment services named LinkUpCareers located in Lingampally, Hyderabad and they told they have some good vacancies in many places. Initially they told me to pay around Rs **** for their service for providing interviews. Based on their feedback, I have paid Rs **** on **nd November **** and they provided the receipt also for that amount. On **th November received a mail from LinkUpCareers and Caterpillar that they are having a vacancy at Caterpillar for the position of Senior CFD Engineer, Bangalore location and they shared me the PDF document explaining the job description and I reverted them back that I am interested in this position. Based on the above details they scheduled me the *st round of interview with Senior HR manager named Prakash Natarajan from Caterpillar on *th Dec ****. After *st round they shared some Profile Assessment test for the *nd round of interview and I have cleared that too.
After the *nd round, they shared (from caterpillar) through the mail that After evaluation on the key highlights represented by you in the Questionnaire, we think that you are a fit choice for the role of Senior CFD Engineer. To process ahead, we have started the background verification of the profile and you can find the verification sheet attached in this email.
Profile verification is mandatory as all the top management profiles have to be validated from all layers of verification. For the Professional Portfolio, they charged around Rs *****. Based on the *nd round of interview, they also shared the confirmation letter on **nd Nov ****. Discussed the same with HR regarding the next step (Call Recordings is available for all discussions).
After the *nd round they shared an excel sheet on **th Dec **** for Background verification and others. Background verification also completed on **th Dec **** from IDFY and Divine technology and document also available for the same.
On **th Dec ****, received mail from HR manager to select ** variables from the list of compensation and other benefits. Filled and re-shared the same with consultancy.
On **th Dec ****, received a mail from Caterpillar (no-reply@cat.com) that, this is an internal recruitment under OTTP (One Thousand Talent policy program) and you need to pay for some approvals namely W* state form ($**), OTTP Federal form ($**) and I-* form ($**) and I paid the total amount of Rs ***** (Bill is available). After paying the above said amount, they shared me some forms to fill and share and submitted the same with consultancy.
After finishing above, they shared (Caterpillar) Business Level agreement between me and Caterpillar and for that they are charging *% CTC what they offered and I paid an amount of Rs ***** (*% CTC offered by Caterpillar). For this also Bill is available.
After paying the above amount, got a mail from LinkUpCareers consultancy that you need to pay service level agreement and for the same you need to pay *% CTC (this is specified in their website) but I replied them I could not pay that amount as I am not having amount to pay. Later they told you won’t get the physical visit to Caterpillar if you dint pay and they reduced the amount to **% of *% CTC. I paid the said **%, ie Rs *****.
In one of the mail, they told that whatever the amount I paid during the recruitment process will be Refunded back once the induction is completed by Demand Draft (DD).
Total Paid amount to LinkUpCareers consultancy and caterpillar and is around Rs *****.
After all this, I realised this will be Fraud and writing to raise a complaint on the same to resolve the case and to Refund the amount with compensation of wasting my time of about * months in recruitment by providing the fake job offer.