Apparent Breach of Contract

I purchased a Chevrolet Optra for my wife in Cape Town in 2011 as well a Motorite Policy. It was for 60 000km /5 years whichever occurs first, we had discussed being low mileage users and agreed this would cover us for the time frame. Until last week we had no problem with Motorite. My wife took the car in for its last service 60 000km/ contract ends 14.2.2016. Later that morning she was contacted by the dealer to advise her that the contract had expired last year when it had been logged for a 60 00km service even though there were less that 47 000km on the clock. She called the Motorite call center to be told that the contract was only for 4 services at 15 000km intervals. After speaking to the dealership and being told to read my contracts fine print and two further calls to Motorite we read our copy of the policy given to us on purchase of the car and could not find any reference to low mileage vehicles or any clause stating only 4 services in the 5 year time span of this contract. I was sms's yesterday to advise me that my contract would expire on the 25.3.2016 / 60 000km which ever comes first, so I cannot understand the refusal to authorize my service last week.