Garbage customer service

It's a simple issue really and the 2nd time I'm dealing with something like this from marquis finance...

They didn't debit my account so i send a mail they dont reply to then try to phone but no picks up and when you eventually do get hold of them after they have wasted your time by holding on the line they feed you bull**** like your account is in arrears when i have never missed a payment then go on to tell you they can see what they can do as if they are doing you a favor then trying to blame all of it on a system migration as if that's the clients fault... Fact is your Customer service sucks because you dont reply you dont phone people back so you after an agreement was signed to debit my account on a specific date every month and for some reason that is rocket science, so i suggest you sort out this problem asap because im not wasting my time anymore trying to get into contact with you