Money down the drain

I made payment arrangements with Nimble in October 2022 for my edcon account. After 2 debit orders, I get a message again saying my account has been handed over and I should make arrangements. I called Nimble and explained that I made 2 payments already but they said they never debited money and I never made arrangements with them even though the reference on those debit orders was NIMBLE... had to make arrangements AGAIN but won't be getting my money back