Mislead

I purchased a new vehicle from cmh pinetown. 2months after that a lady by the name of Roxann stewit called me saying she is part of Standard Bank and offering me a service plan, which I agreed to as it was a brand new vehicle. I requested a sales call as I was informed calls are recorded. My vehicles first service @15000kms is almost due. So I've booked in the vehicle for this weekend 27/07/2019 @ cmh pinetown. In the week the service department advised me they will get the authorisation for the service plan in order for them to repair or service the vehicle. At 16:35 I was called for my odometer reading, thereafter 10min later I was called back and said I cannot use the plan as there was a 3month waiting period. I was never told that, had I was, I would have budgeted myself as I cannot lose the warranty on a brand new vehicle. On my policy, nowhere does it say my policy is active from August. It clearly states policy affective from date of sale or on expiry date of existing plan. I do and did not have an existing plan. Wat do I do now? My vehicle works for a courier and we do not get days off, neither will my insurance give me a hired vehicle.