Extremely bad service, experience and workmanship

I needed to upgrade my alarm system. Upon completion technician said everything was set up &tested. Upon checking, I saw certain parts of the installation were sloppily done, not finished &there was a mess of discarded materials around the house. Marshall came out to fix. Following day, I find out that some of settings &programs were not done. Marshall again came out to fix. In total I had to take 3 days leave. 2 weeks later 1 zone starts to fault. I bypassed zone until I could get some leave. A week ago the keypad goes dead. Marshall come out &say that the old wiring has been shorting system. They got keypad working but could only assist next day. Next day I get a quote to fix system, saying that it was old system that caused the problem. I refused to pay as it should have been checked &done at Installation. Marshall eventually come again to fix. When I get home I see that wires are hanging from a window, passives are now not working at all &the brand new battery from installation is now damaged. When asked to re-programme system because they had reset it, technician said that we have a manual &should sort it out ourselves.<br> Marshall Security have closed the work docket as fixed.