Change of Bank Details! Poor Service!

I took a funeral cover with Capitec Bank and used my FNB account for debit orders. I recently moved from FNB to Investec and my banker has been since trying to get hold of Capitec to change the banking details without any success. I have also tried to call their useless call centres on several occassions without any luck to being assist in just changing the account number. Also, I was informed that I need to go to the branch to change the account number which is utterly ridiculous! I find this service to be very poor. I managed to change all my other debit orders without going to a branch in other institutions? With Covid19 infections being on the rise in Cape Town, this is risky and irresponsible by Capitec!???