Bad customer care/service

I handed in a tablet for repairs in January (within the warranty period) where I was told it no longer qualifies and was given a quote for the repair and told that a consultant would contact me. Nobody contacted me so I eventually went to the store to find out what's happening. Nobody seemed to know where the tablet was or what was happening. They sent emails to find out and said they would get back to me. A few weeks later, I still hadn't heard anything, so I went back. Once again nobody seemed to know what was happening. Eventually I was told that my quote has been rejected by me (which never happened) and that I needed to pay an amount for the tablet to be returned. I made the payment an sent proof of payment as requested. I went back to them probably a month later to follow up as I had not heard anything from them since. I was then told they had switched courier companies and that's why it hadn't arrived yet. But it should arrive any day and they would phone me as soon as it gets there. After that I went back again and got the same story. It is now almost June. I find it hard to believe that it can take any courier company this long to deliver something. Very disappointed