Unacceptable treatment from Suntank

I had an emergency at my home and Suntank was able to assist me quickly and for that I was very grateful for, unfortunately that is where it stops. I paid for the service of my solar system on the 14th as requested by them. I received a booking confirmation on the 28th saying my system will be serviced on 6 September 2019 (that after I followed up on when my system will be serviced). So, on 5 September I receive a new e-mail saying that they are not able to service my system on the 6th and will only be on site on 9 September. 9 September however came and went….. I phoned them on the 10th asking what is going on and why wasn’t I informed that they will not come to my premises. I requested that a manager above Helen Maier will contact me. I only received an e-mail (from Helen) saying they are sorry for the delay and rescheduled me for 13 September!!!!!! I requested from Helen why postponing till Friday with NO reply from her. BAD SUNTANK VERY BAD!