Pathetic customer service

I purchased a voucher via Groupon for personalised phone covers 17th March 2015. On trying to place the order via the companys website, the discount did not apply. I contacted Delme who asked that I email through my request, including the photos and proof of payment. I did not receive any feedback from him - had to follow up several times and finally received the phone covers on 26th March. One cover was done very well but not the other. I asked that he redo it which he was glad to do and I asked that it be sent to me only a week later as I was going on leave. I contacted him on 7th April asking for it to be delivered but it was not done. I was promised delivery on 10th April but nothing arrived. I contacted them again and he emailed back saying that there was a backlog - to date 21st April I have not yet received it. When contacted he is aware and makes promises but does not stick to them. It's shocking to know that they run a business with no care for customer service, little or no communication and empty promises. I am extremely disappointed and can't believe that this level of service is offered by them and there is no one else to speak to besides Delme.