Bad service with fixing toilet

I had used Drainco when I needed to replace my geyser and received very good service from them. When I had a problem with my toilet they were definitely first on the list to call. The two guys replaced the flushing part and had to come at least three times because, not every time, but when I flushed the toilet made a hectic shrieking noise and I had to flush again to sort out the problem. I had to transfer the money for payment while they waited and they took a photograph of the deposit. This made feel very uncomfortable. The last time they came, they fiddle again and then said that they have had complaints about that make of part, but no suggestion to replace the part. I had to call another plumber who replaced the part and pay again. I will definitely not recommend Drainco, which was what I had been doing after the good service first time round