Easylife Pools KZN Sold Me Faulty Swimming Pool Light

In October 2019, I bought the MISSISSIPPI 3M X 5M SWIMMING POOL from Easylife Pools in Durban. In addition to the standard fitting that come with it, I added a swimming pool light and all was delivered on time. The swimming pool was installed by a qualified and experienced installer, including the electrical connections for the pool light. The light has never worked and I've sent Easylife Pools multiple emails, made numerous phone calls to no avail. The lady I've been talking to on the phone and sending her emails keeps making promises that they don't keep. She first suggested that the pool light was not wired correctly and I assured her that all the work on this pool was done by experienced professionals who install swimming pools all the time. She's been promising to forward me a wiring diagram that is supposed to show how to connect the pool light. I just don't buy this excuse and I want them to admit that they sold me a faulty pool light and exchange it, that's all.