Wors tanks and service giving a second hand pump when you pay for new!

Bought 5 x 1000lt tanks + 1.5kw pump and cover They only had stock of 2 tanks and the other 3 arrived 3-4weeks later and 4 of the 5 tanks were leaking that our plumber had to fix. The pump was a second hand pump, after the installation the pump wasn’t working and our plumber realised the pump had rust etc in. I WhatsApp the manager and he informed me he has a new one sealed in a box for me. To date I dis not receive a manual with the new pump and Roto is refusing to pay the removal and re installation fee of our plumber! The pump cover was never received and they had to credit it. I have reached out to head office as well and it falls on deaf ears and the manager of Richardsbay is the rudest person after I was patient the whole time. I had to pay the plumber the additional fees now as well