Need help, they won't help me

I made an enquiry with MSD Consulting in September 2025 and changed my mind within days. I asked in writing to cancel on 29 September 2025 and paid their cancellation fee on 1 October 2025. That was over twelve months ago. A "Debt Review Application / Grant" status is still on my credit profile. It has blocked my access to credit, including a credit card, and it keeps dragging down my credit score. The debt counsellor never answered a single one of my emails or phone calls in a year. I copied him in repeatedly. I even had to look up his email address on the NCR's website myself. The only replies I ever got came from other staff members, after I chased them for weeks. MSD only sent me the 17.2 rejection and proof of service in March 2026, five months after the rejection was dated 12 October 2025, and only after I asked for it. Yet that letter says the bureaus were told. Experian says it's MSD's job to fix. MSD says it's done. The listing is still there. I have now spent a year, close to 100 emails and several complaints to the NCR, the Credit Ombud and the National Financial Ombud, because the one company that could end this won't pick up the phone. Zero accountability, zero communication, and real financial harm. If you value your credit record, stay far away.