Unfair treated by motordealer

Ibought a ford ranger 3/02/18 from Princes vw benoni.After i drove with the vehicle a few weeks later(my sun is using the vehicle )i found the gears are not shifting smoothly(automatic)I phoned the salesman about it ,he said we have a warrantee which they recommendet to me on the vehicle i must drive it until it brakes then the warrantee will pay for the gearbox.Ireceived no contract or conditions from the warrantee people which i found out later is innovation group. Idrove vehicle 5 months and three days when the gearbox failed to change gears propprly.I phoned the salesman and he said we activated the claim at innovation.When i phoned innovation i was not registered ,they could not find me on there system.I found vw benoni never registered me at innovation ,they said they will do it and then we can proceed with the claim.I serviced vehicle privately at 150 000km ,i did not know it must be done by a MRI approved dealer because i received no conditions from innovation becaused i was not registered with them ! .Iam using the vehicle for business and had to use my private transport for work.Innovation sen my vehicle to maifair gearboxes in jhb from vereniging for quotation,but when they received quote they refused to carry on with repairs and said they will cansell warrantee and refund my money.Iphoned manager at vw benoni he said they wont pay for repairs and i must use my rights which i feel is fair because i was treated unfair by both parties.They said i should not have done the service by myself.I went to the onbutsman and await their feedback.I paid R30 000 for repairs at Maifair gearboxes and would like to claim it back from quilty partie.I would realy appreciate help from hellopeter.Thank you for the opportunity.