No Car Service to be paid

I have a contract with Ariva since 2017 last week Friday I took my car for service then I was told that my insurance has expired when I called the company I was told that they will get back to me which they never did until I called on Tuesday I spoke to a lady by the name of Lesego who was very rude she told me I can't sign for a contract that I didn't read as if she was there when I signed when I ask her that on their website it is written that their cars have full maintenance she told me that I sign a different contract what I don't understand is how can they have different types of insurance when we have rented theirs cars my knowledge was that I pay for the car they pay for the maintenance only to be told that I must pay for the service what I don't understand is that am paying for their car and I must be the one who must maintain it how does that work I make sure my my debit order are up to date this is really unfair business practice