I regret opening Identity account

I have settled their account last year September 2025 Already but there is a company that calls me everyday asking me to settle the account. My last payment was done in store and I owe nothing according to my knowledge. It looks like I was handed over to two different collectors I have set up a debit order with the Vericred but now daily credit solutions demands payment. I don’t know what to do anymore! These people bother me every single day I have to explain one thing to different people in that collection company! I called Identity and they told me I owe nothing on their side I even checked online today it says I owe nothing.who can help me get out of this misery. Daily credit solutions demands a paid up letter but I cannot get hold of anyone at vericred