Account payments and stuff behavior.

I received an sms saying i have to pay my account, which i paid in time as i get paid on the 20th of every month. I have never defaulted instead their stuff pays money into wrong accounts and fix later.

I paid twice on a Lewis store in Commissioner street Johannesburg, same mistake again.

The worst service experience ever, customer experience is bad with the Vereeniging branch. Instead of them assisting me, they tell me i always call in to complain. If money is not paid into the correct account by their colleagues, whom should I call to complain to?