Mechanical warranty

A few months ago wanted to find out why there was an insurance charge on my vehicle statement, to which I called absa vehicle finance. The consultant told me to contact my dealer, which I did and dealer advised that on their side there is nothing. I decided to go through my contract and there I noticed that I have mechanical warranty. I sent emails to absa inquiring what it covers and how would I claim should I need to. No one got back to me. I sent them an inbox on Facebook, no answerered, I wrote on their wall, still no answer. Hopefully someone will assist me here. All I need to know is what does it cover and how do I claim should I need to on something that I have been paying for, for almost 3 years