contract

Good evening firstly I would like to complain mrprice mobile whom I had a contract from 2017 and the duration of the contract was 24months. It came as a surprise to me to discover that way long after the Contract time was expired that mrprice mobile was busy debeting me and when I reverse and for enquiry they said I should have written them a letter for cancelation of contact I said I was never told all that I knew was the contract was 24months.