I'd like to make a complaint

My 2nd gen ring doorbell suddenly stopped working. I have spoken to customer support and there is nothing they can do - it appears to have been fully charged when it went offline, but I can’t get it to go into setup mode or connect. It’s 3 years old so it’s out of warranty. The very polite customer service lady can do nothing other than offer me a 30% discount code, which takes it to the same price as Amazon. Not what I expect when spending £60 on a device, plus the accessories I bought to go with it. Very upset and crossPreformatted text