Horrible experience unprofessional staff

I purchased a bed on lay-by a few months ago. Every single month there has been a problem with making a payment on this bed. Firstly the only office I could find was a warehouse with no one there and no working telephone. I when I enquired I was told to pay in the mall... went to the mall 3 times that week no one was able to take my payment until the 4th time I went. This month I have been experiencing the same problem, I went to the mall on Monday to make my last payment I was asked to return later as the no one can take my payment, I then returned and was still no one could help me. Today I went and was told again to come back in an hour as if I have all day to wait around. I then sent a msg to the whatsapp number and the person that rep**** told me it’s my fault I should phone first before coming to the mall... if you’re stalk is in the mall and that’s the only way to make payments should there not be someone there during working hours to accept payments and help customers??