Appalling service

Worst service ever! Have not sorted my payment made in June which is reflecting badly on my credit portfolio. Nobody seems to know how to help me!!!! I have called, sent emails, went to yde store, but nobody seems to know how to help me! How unprofessional is that! It’s been 3 months of constant calls, emails etc and it has been really draining! I’m now going to proceed in involving lawyers cause it’s been a constant drain! How long can it take just to have my account sorted surely 3 months is just way enough time