Net too small and no after sales service

We had a net made for our pool about a year ago. We have a new granddaughter who spends a lot of time with us. She is 2 and a half now. We gave Rory our measurements - he gave us a quote. From then on - things went pear shaped - and I should have cancelled. He didn't keep to deadlines and told us our measurements were wrong and the price of the net almost doubled! I was desperate to have the net on as my granddaughter was spending the weekend with us so we went ahead. He arrived with hardly any of the things he needed - had to go backwards and forwards several times to fetch things - very unprofessional! When he left he told me that the net was very tight but would stretch in time. For the next 9 months we never swam because we couldn't get the net back on. Over December we had people housesitting for us and they took the net off completely. We have tried everything - we can't get the net back on. It is now pulling our bricks out of the paving around the pool. It has no starting tag at all. I contacted Rory a few weeks ago and asked if he could send someone to come and refit the net for us - we would pay him a call out charge. He NEVER answers his phone - yet when you message him - he has a lot to say! He told me that he instructed me to put cutex on the clips. He also said he had no signal where he was (yet he was sending me messages) and that he would get his boy Sam to come the following Wednesday. This, of course, never happened. The Wednesday came and went - no message - nothing. When we tried to call him again - he ignored our calls and has now blocked my partner. I called on the services of a reputable pool company who have advised me that the net is too small. He said that you can never do a net without a starting tag which he usually puts at the weir. I am going to sue for my money back - if it's the last thing I do! I will not take this lying down. It is a lot of money for us. Please think before you use them - mine was a net - yours might be a complete pool!