VVM refund

My account was taken over by another firm and I made regular payments to the new firm .Vvm decides to send me a link to make payment to them even though the account is not with them anymore .I end up making payment and after they admitted it was a mistake I am now waiting 2 months for my refund ,they don't take my calls anymore or call me back .This clear ***** or theft I will be laying ******** charges regarding this matter.Kept on giving me the run around and now ignoring me