CUSTOMER SERVICE SUCKS

I purchased a Polo Gti 2nd hand from a dealership the second day of having the vehicle mfc call centre calls me to sell me their warranty before anything they had asked me if my vehicle has been modified and i dont know i just bought the car and i asked if i could take the car for an assessment and the call centre agent said no. Now my vehicle has been sent in for repairs and they reject my claim saying my car is modified. How is this my fault if i asked for an assessment to be done and your said i dont have to ? i have call the call centre numerous times and have been placed on hold for more than 45minutes. When asked to speak to a manager or supervisor i get placed on hold again ! what kind of customer service is this ? how is this my fault and why do i have to pay ? are yourll just robbing everyone of their hard earned money to get sales and not live up to your standards ? This is dam ridiculous and you guys call centre need to be fired because they are of no help and there is no customer service that they deliver. This has been a complete waste of time and money. I see on this site that i am not the only person to complain about the **** service. You guys are a bunch of rogues