Jet does not know how to do there work , and now it is affecting my credit score.

Where to begin? A few months ago i phoned Jet and a gentleman was assisting me over the phone , I asked him to please set up a debit order for me , as i don't always have time to go in store and make my monthly payment and that i do not want to pay late.We went thru the process i gave him all the information that he requested to do the debit order , he did say i must go in one last time to pay in store and then the debit order will start to work from the following month.I did as he said , then i started to get messages that i need to pay my account , i then phoned and asked them what is happening , is my account up to date , and they said yes everything is fine .I then left it for a while until i got another message , i then phoned again , this time i at least got a reference number which was :***/GO the person who helped me said no my account is fine and no need to worry.I received a call 2019/07/08 at 16:25 Pm from Jet to say my account is not up to date and when will i make payment?This is when i felt like i want to explode , after all the phone calls i made still no body knows how to do there work , from setting up the debit order to phone in and ask if everything is okay. MY BIGGEST CONCERN HERE IS , IF THIS HAS A INFLUENCE ON MY CREDIT SCORE , WHAT AM I SUPPOSE TO DO , AS THIS IS NOT MY FAULT???? Last bus not least i received a message that my account is suspended until further payment. I would like to sort out this matter A.S.A.P and please all Calls are always recorded i ask you to please get the recording of all my phone calls.