blue wave pools H & A development incompetent repair, charged for faulty equipment, does not return calls sachse, Texas

Scott Allen (H & A development / blue wave pools / Scott Allen Pools) was contacted to replace our $1100, three years old DE pool filter with a low maintenance sand filter. we paid him $750 for a new filter and installation, but the filter did not work. he came back 4 times to patch and glue his faulty plumbing and finally stop showing up. We had to contact another pool comapny and pay them about $450 to do the job right and get the pool equipment working again. The pump and filter are now working but the pool remains cloudy. Obviously the filter is either faulty or incorrect size. they do not return calls. We have filed a complaint with BBB, FTC and now here. Some companies should stay with pool cleaning only. This company at the time we contacted them were on the recommended list, but now has a big fat F with BBB.