Techs don't like to get dirty???

We have used them twice due to buying a second awful LG washing machine. No reflection on LG as we were **********. We received good comms and service but its no good technicians don't like to get dirty when having to pull out the machine and push it back in again when carrying out repairs. It appeared to be an effort for them. Also we never knew the machine had black mould in it and the technicians never noticed or said anything. Surely after fitting a new pump they would have noticed and either assisted us to clean it.. or let us know how to clean the mucky build-up? Very disappointing