Lenovo India Pvt Ltd - Under onsite warranty service delayed by Lenovo

We have a complaint in a Lenovo V*** Laptop that has bought on ** Jan ****. We bought ** numbers of the model on that date in the month of Jan ****. We have a problem with a hard disk in one of the laptops. We complain & after ** days they came to our premises and replace the hard disk based on the warranty.
Now once again we faced a problem in another Laptop about the same issue of hard disk and we checked at our end with a software tool and then we raise a complaint on *th AUG ****.
Day * (*th Aug ****) while calling the customer care number they suggest to use the Lenovo WhatsApp support. So we contacted and share they required details like device serial number, hard disk problem diagnostic both the things we shared in image format.
We received a message with the laptop is out of warranty. We told about the earlier service and that invoice is having ** serial numbers.
They said they required the invoice copy of the laptop purchased. Once again we submitted the invoice that contains all the ** laptops serial numbers.
During the previous warranty claim on Jan **** also we submitted the invoice copy to service people. We explained the things once again and we forwarded the required invoice copy to the email id pop@lenovo.com provided by Lenovo support team. We chat with the people once again to confirm the invoice reach. They ask us to send the invoice to the concerned team.
We will receive a call from Lenovo Support Co-ordinator Systech Services Ltd. Bangalore and they ask us to send the invoice details to the email id Systech.blr@teamsystech.com.
Systech replied about they forward the invoice to the Lenovo team to update the warranty. The service request number is **********.
Day * (*th Aug ****), We received an acknowledgement on *th over through mail and it mentions the dealer seal and sign is not there in invoice and they ask us to get the invoice with seal sign. On the same day, we will submit the invoice received from our dealer and mail it to Systech.
DAY * (*th Aug ****): We received a mail with the details of the base warranty of our machine is updated as per the invoice for the invoice Lenovo site also.
Day * (*th Aug ****): We wrote a mail to Systech about the process. M/s Systech replied on the same day about, warranty is updated & waiting for the spares from Lenovo. We though the process our request but there is no process is done on Lenovo side.
Day *th (**th AUG ****): Some of the people from Lenovo feedback called up and say your device is out of warranty. We will send a quote please acknowledge the same to provide service support. I explained the device is still in warranty what is the purpose of paying the amount to the hard disk. The service request number is ********** / R**R**BU
Day *th (**th AUG ****): One more gentleman called up and confirm the device is in warranty, and arrange but they want the diagnostic screenshot on their software and we received a mail from gaka@lenovo.com with a link.
Day *th (**th AUG ****): Once again we tested the defective laptop with the tool provided by Lenovo support team, that tool also conforms the same about the hard disk failure and sent the screenshot of the test result over through mail. The service order number is **********.
Day **th (**th AUG ****), Received a call from Lenovo on *** **** **** about they received the replacement spare and going to depute the engineer by tomorrow. We committed to our end-user for a duration of * to * days for the rectification timing, due to this irresponsible time waste by Lenovo we paid compensation to our end-user on a daily basis of Rs. ***.
It is a horrible thing to answer every day to our end-user.