USELESS SERVICE !!!!

I have closed my accounts with Cell C over two years ago. After many complaints on Hello Peter I was finally sent my paid up letter confirming that I owe them nothing and that the accounts were closed. Now tonight when I checked my score on Clear Score it shows as a default. This is messing up my change of moving into the property we have app**** for. The call centre is extremely useless and clearly there are some of the consultants who need further training. I want a manager to call me to resolve the issue as I’m tired of having to go through security checks that I don’t remember anymore as it was over two years ago and all my details have since changed. This is getting ridiculous now and I will not have it any further. My ID number is and I want this issue resolved. How the hell do you send your clients a paid up letter to confirm an account is closed then a year later you list a default. I want an answer!!!!