Poor backup and incorrect repair advice

After multiple attempts to have our mulfunctioning gate intercom system serviced for a problem that we assumed would be a small hardware repair we eventually gave up with comb.. comb recommended we replace our outdated unit as the speaker probably isn't working due to the cellphone networks upgrading from basic GSM etc etc .. they had kindly provided a quote to upgrade our unit for approx R30k.. we ended up using a gent with some electrical experience to test the components and replace the internal speaker for under R1k and magically the intercom is working perfectly again.