Incompetency and customer harassment

I bought furniture from the store and they made me sign a debit order which is debited every month on the 15th and every month on the 15th they call and ask if I have paid and it is so annoying because I have a debit order for payment of my car with a credit more than Lewis but Westbank never calls me every month to ask if I have paid I regret going to Lewis for the furniture account Last month I bought a coffee table on credit from the same store Lewis roodeport and they call that I didn't pay for the coffee table but they forcefully made me sign up for the debit order which I did not mind but I can't keep being followed up for their incompetence I checked my account and find that the debit order for Lewis store went off and I thought they had combined my accounts really frustrating to be followed up like this