I need to complain, support just told me they don't do it!

The support person I just spoke to said that I cannot raise a complaint with them, so I made a big stink and asked for the supervisor to call me, my chime has ceased to work after 2 years and 3 months and it’s no longer under warranty, most mecahnical devices last years and years longer than this, it’s totally unaccptable qaulity of build for such an EXPENSIVE item!!!