I was conned to max Plat. A Range instead of C Range my car qualifies for

I've been sold a car warranty over the phone. asking the best cover for my car. He offered me the best range Platinum A cover at R410 monthly I took it and did not take the cheaper one of in the R200+ range(C). But I only found out 2 weeks ago my car only qualifies for the C range. The rep did not tell me how it works. I was happy and even rated him 5 star on Hello Peter