Not helpful at all and will stand by while they know you are being taken advantage of

I was finished paying my account in November 2020 for Wonga finances. I was told that I would get a paid up letter in 42 days of settling the account. After MANY MANY MANY MANY calls and promises from normal staff to supposed management and I still haven't received it. I explained to them Wonga was trying to ****** me and they agreed that what wonga was doing is not right or legal and offered a settlement discount. I paid this. Now i still dont have a paid up letter and now Wonga is trying to get more money out of me again. You guys are attorneys and should know whats legal and not. What they are doing is ******* and now I don't have proof besides a few recorded phone calls between me and you guys. Please man, juat send my letter. Id like to move on with my life. Instead my credit score got affected due to your neglect and awful services. Please just help.