Bad service awaiting paid up letter

Absolutely disgusted at this company . I paid up my loan on the 25th of feb. It’s a month later and despite numerous attempts at getting a paid up letter I have still not received one. My debt counselor is dealing with htn attorney’s and Wonga and we both are getting nowhere. Both places give contradictory stories and information. Please sort out this issue. I sent proof of payments and can’t get through to the call centre and receive stupid replies to my numerous emails . This pathetic company is holding me from obtaining my clearance certificate. Utterly disgusted at the bad service . If this matter is not escalated soon I will be taking it further. Abigail