APPULING VODAVOM CUSTOMER SERVICE

I have changed my bank account and realized my debit order has not fone through, I then made payment on the my vidacom app on the 03 November 2020 using my credit card, I also called vodavom to update my banking details, its been 7 days and no one can resolve this issue and my account says its in arrears, I cannot accept this level of poor service I recieved from this reputable company its appuling the level of service I get after paying and trying to get this sortwd out which it seems like the app is a **** for payments. It would be nice to get feed back from this company a call or email would be nice to whats going on