GC Fires - you're fired

Honestly, this is the most frustrating business to deal with when it comes to after-sales service. All we want is a quote for repairs on a unit that GC Fires installed for us over 3 years ago. The receptionist gave us a Whatsapp number to send photos of the damage to, which we did. We were then advised not to use that number and to provide a copy of the invoice as they changed systems and lost their client information. This is an ongoing problem with GC Fires - just stalling, blocking, avoiding responsibility, not responding to emails or phone calls, etc, etc. Shocking service all round.