Bad service at Cradlestone Edgars

I received very bad service from a Supervisor at Edgars Cradlestone. I have a Jet Account with which you can buy at Jet, Edgars, Boardsmans and others. As I am bedridden and can't go to the store myself I phoned the head office and asked if my husband can buy om my account. According to them I just need to give him a permission letter, my ID and the store will check that my signature is the same as on the card, then he can buy . So it was done without any problems at Edgars Key West, but come to Cradlestone Edgars it was completely another story! He could not buy at all on the card . I phoned and spoke to the supervisor to explain to her that I am unable to walk and that it was permitted as such at Edgars Key West, but she bluntly refuse to be of any help. I just wonder - will I not be able to buy anything at Edgars in the future as I can't go myself?