I have consulted a legal advisor!!

Cell C - i was supposed to upgrade at the beginning of December - and you guys have declined my upgrade because i owe you money.. after i cancelled my other contract with you guys MORE than 2 years ago. This is not my problem that you CANNOT find any record of it. What sort of service are you guys providing your users!! u qwik to bill us every month - but when we need to upgrade our contract you don't stick to YOUR rules, so i have consulted with a legal adviser and was informed that you CANNOT deny me the upgrade as this current contract is paid up to date. so i WILL hear a favorable response from you guys in the next 48hrs..or i will be taking legal action!!! this is utter nonsense and pathetic service, you cannot even get through to someone at your call centre that can speak and understand you clearly?