Discovery Health not so up to date

I changed the bank account from where my debit order goes of to Discovery Bank, two week before the debit order goes off, Discovery Health takes the debit from my old account and the new account, I reversed the debit on old account because Discovery Health had their debit, now they charge me double, and my membership to the health scheme and vitality is on hold till I make payment, which I am up to date and I send them proof of my debit orders that has been succesfull.

Then I have to carry all the costs because of unseccesfull debits and other penalties

They could at least have contacted me before putting my memebership on hold, and all the trouble I have to go through to proof my innosence