Unhappy client

I am a consent client who bought the car at auto pedigree modimolle in march this year but already the car has a problem of the engen.on the 1st of November the car was towed to nissan bb auto polokwane due to mechanical problems,the contract state that i have a 3 years warranty but what amaze me is that they tell me about the warranty of the manufacturer which id Renault that no one had explain it to me and they need me to pay 25% of the repairs.i tried to get hrlp from the regional manager but still am not winning, hr tells me that i now want to blame them.i urgently need help.