Hyundai Motors India Limited - Bad service done

I gave my car at Gandhi Hyundai Solapur on **th May. Till date, the car is not repaired. The car had to start trouble for which I repeatedly visited the service centre from more than six months or even more. The car was at the service centre in the month of Nov ** (unresolved problem during servicing), Feb** Mar** (*week), April ** (* week) but the issue was not been solved by the dealer. I had a claim for front bumper change which they did not do it properly. I raised a complaint. I had to visit for the bumper change thrice and the dealer did not accept check payment. They committed to change ECU in insurance and I do not have to pay any cost and forced me to close the complaint on its behalf.
Lastly, I gave my car on May **, ****, to date the car is at the service centre. The car had a starting trouble with petrol version and is working on LPG. Firstly they told on ** May **** they will replace ECU in insurance. I don't have to pay then they said I have to pay **% and insurance will pay **%. I said ok for **-** late in May last week. Later May first week then they said insurance was rejected and I have to pay ***% amount and told the cost of the part is *****/- INR and they will wave of service charges as compensation for the last complaint. I gave them consent to replace they said they have already ordered the part and I will get my car in a couple of days. In the second week, they said ECU has not ordered and I have to deposit *****/- as advance payment which I deposited on **th May (pls note the quotation was *****/- ). Later they said the price has changed from *****/- to *****/- and I have to pay ***% amount. Starting from no payment to *****/- details of car - Hyundai eon +lpg
VIN - MALA***FLDM******
Complain
*. The delay was from the dealer side.
*. No prompt service wrong data entry into the system and no entry many times.
*. Arrogant staff.
*. Dealer does not accept check payments only cash payment they said to me at the time of payment. Neither informs customers prior that they do not accept the check.
*. Repeated LPG mileage issue unresolved from day one.
*. Poor service repeated visits for the same complains.
*. False commitments and wrong information are given.
*. Cheat the customers.
*. Did not reply to phone calls and no coordination between staff. Have internal issues for which customers have to suffer.
**. Do not have pickup and drop facility.
**. Very inconvenient service centre no public transport facility
**. Insurance issues do not cooperate if the insurance isn't taken from them or their tie-up companies.
**. Mental harassment, economical loss, inconvenience.