Bad Service

After the PlumIT guys were at my house last week on the 14th of August, I was left with an invoice of R450.00 that said that there was signs of the drain being blocked, but that on arrival the blockage was gone. Unfortunately that information was wrong, because it was still blocked that evening when I got home, and I then sent a whatsapp immediately to state this. Upon receiving no reply the next morning, I got someone else to open the drain, (unlike the PumIT team they found the blockage). Now I am harassed to pay? For what exactly. Would you pay if I had to fix your IT systems and it was not fixed? Or if you brought a flat tyre to me and I said there was no puncture in it, but it would not hold its pressure? So if you want to be paid, fine. I'll pay the R450.00, but after using you 4 times during the past year, rest assured, you will not be getting any calls from me, as your non service actually sent me to someone that is asking a lot less than you are, but also, more importantly, can actually open up a drain. Regards, Your ex-customer.