Bad and poor customer service.

I phoned I style Mellins Woodlands and ordered my contact lenses. At first the person that answered the phone struggled to get my file and was totally confused said it seems I have two files. Eventually the lenses was ordered. I waited about two weeks before I phoned and was told the lenses were there. Nobody took the trouble to phone and notify me that my lenses are there. Went to the store to collect and asked to put it on debit order again as was done previously. Debit order of my last payment was deducted 26th August. Surprise the lady that helped me told me the debit order request can't go through need 50% of invoice. I was told by Surprise that I must phone Mellins Account. I Phoned and spoke to Michelle which said the payment should reflect the next day and then everything would be fine. i waited two days and went back. Surprise tried again still the same message she then phoned again and spoke to Rochelle which said it is got something to do with credit score. This I think is totally ridiculous. How could they then in the first place with my previous debit grant the debit order. I then personally phoned and spoke to Rochelle who promised that shw will look into the matter. Up to today no feedback. I have just received bad service from Mellins. I can't believe that a medical aid Discovery can partner with such a unprofessional service provider.