Sabotage to get more business

I recently contacted Centurion Electricians also known as Fast Plumbing and Electrical (PTY) LTD according to my invoice, for assistance with my stove. After fault finding, it was found that the circuit breaker needed replacing. Once complete I was told to pay immediately and the electrician was hovering over me whilst I was on my Internet Banking app. I found this strange as all my details was given to the electrician and I could easily be found if did not pay. I later found out that my geyser had stopped working and I suspected something was done whilst changing the circuit breaker. I called Centurion Electricians and asked for them to come over have a look. I was then told a call out fee will be charged and being a 24/7 service they can only come over the next day. I later found out that the electrician had disconnected my geyser whist working on the circuit breaker. This seemed like a plan to get more money from me by causing other issues. Very dishonest business trying to trick people out of their hard earned money. The no callout fee and 24/7 service is just a hoax to attract customers.