No internal communication of their departments

I've been a customer for 3 years now. I never missed a payment.

When i needed to update my banking details to a new account all things went smoothly, until the debit date.

They debited both my old account, which had no money in it, and they debited my new account.

The old account went into overdraft and costing me more money.

Because of that payment bouncing they are harassing me for payment and threatening legal action. Over R229....

My new account was debited on the 26th of May, which conveniently does not reflect on their side, so the harassment continues.

I have sent my bank statements of both accounts, showing the debit order went off and that i have paid, their allocation department email, which they are ignoring...

I have canceled my service with them due to incompetence and will take my business elsewhere.