DMC not updating profile and advising my creditors that I have paid up all accounts handed over

I really don't understand how DMC debt management works,I had a few accounts which were handed over to DMC and last year in March 2020 I paid up all these accounts and I was promised that 21 days from the date of payment then my creditors Will be notified so my record can be rectified and to date the creditors have still not been notified even though paid up letters were provided to me last year.

So basically I have accounts that fully paid but my record is still bad ,had I known that they were lying to me about advising and referring my payments to my creditors then I wouldn't have taken up all my savings to pay up everything .I would have saved up money to survive.

I phoned DMC even today and I was told that I needed to forward my credit report to them in order for them to update on my profile..I asked why it's now my duty to follow up and provide a credit report when they **** to me about the 21 day policy from date of settling all debts

They confirm that payment was received yet nothing has been done on their side.I still can't buy a house as I had planned .