multiple sensors failing

What is your question?

Any chance at all that all of the following could require changing at the same time: 3 x O2 sensors 1 x air fuel sensor I lost confidence with the repairer at this stage after 3 weeks and a huge bill. Took it to another shop who found that the ECU was faulty and they fixed it and the car is now fine. Just wondering whether I was ripped off by the first repairer?