Panasonic — washing machine service

I have an issue of water drainage from my washing machine at the time of running, i raised the issue to customer care and engineer came to fix it. My machine was in running condition and engineer already checked after that he came next day with spare for water drainage system and replaced it while doing this i also informed that my timer is stopping in between so he said timer need to change after that he came with a timer and replaced it but machine not started. He spend almost a day and also called another engineer for help to fix it but both of them not able to start the machine, after that in evening he said you have done some work from third party and he has done wrong wiring so wiring need to replace but how it is possible that the running machine had wrong wiring? When i ask this question he was blank and silent. After that i have paid them for all the works whatever they said including wiring. After handover to us again there was the same issue. Water drainage problem still there, timer stopping is still happening, and one more new problem added which was not there earlier - buzzer not working. When we have informed them again they replied very casually including the vadodara service manager panasonic that ok we will come. We are facing problem from last one week continuously & we paid the amount also but the problem is still not resolved.