Has anyone here experienced issues with Vodafone unable to debit their credit card?

I have moved banks and I have a new credit card. The credit card attached to Vodafone account is that of my old bank and that credit card has now been closed.

I have loaded my new credit card onto my Vodafone account but I can't remove my old credit card. When I try and remove my old credit card from my Vodafone account (either via the app or browser) I get a message saying "oops something when wrong" immediately followed by a text saying "sorry your credit card was not de-registered please call customer services".

I called customer services and they can't remove my old credit card either. They say it must be something wrong with my mobile phone (which is clearly not correct). I asked them to escalate to higher support a few days ago but never heard back

Has anyone else experienced this?

Thanks