Gonna need more details tbh.
Pinnacle road bike comes in for a service and new 10speed chain. Boss books it in and I go with whats written on the book.
Took the cassette off cleaned it,took the hub to bits cleaned and greased it,cassette back on,fitted the chain with it being the correct length etc. Set the back brakes up and then move onto running the rear gear cable + new outers as they were rough. Go to poke the cable through the shifter and notice it isn't in 10th as the bit the cable end is help by isn't there. Go to shift down and it only moves two clicks and stops....still no sign of said part,shift up and it only moves two clicks again before stopping.
Phoned the customer that day(Thursday) and ask why it didn't have a cable on it when I started work on it and he explained the cable had snapped. On that I asked if he got the end of the cable out of the shifter before.....which he hand't so I explained it was probably that causing it to jam but I don't want to take road STI shifters apart as I've never worked on 105 shifters before and suggest that I let the guy in the next day do it as I know he has had his shifters in bits and to try and get the old cable out.
I find out halfway through the day after the guy had worked on it that he had it in bits and no cable was found and it still has the same problem. The customer phones not long after I found out and was still rather busy. He gets really annoyed and accuses me of of doing £200 worth of damage to his bike(i had said a pair of shifters of that qualiry were £200 - so £100 was probably likely for one shifter - so trying to fix them first might be better)
He claims I shouldn't have touched it if I wasn't sure to which I said I didn't I tried to feed a cable and left it at that. He is also raging that he needed the bike for tomorow for the Glasgow to Edinburgh run which he never mentioned when he brought it in(a week ago) and failed to mention again when I called and said about the problem with the shifter.
He then got really annoyed when my boss said he would only charge for him the chain which he now has but wouldn't give him it at cost(the customer asked). He failed to be reasonable and didn't ask for us to get him his bike usable for tomorow or to get a suitable bike until his is ready!