Gate Code to Community not working

When vendors or friends punch in my gate code # it goes straight into my personal voicemail or I get "Due to telephone facilities trouble we cannot complete your call". The community administrator and gate code company have checked on their end and say it is not their fault, it is with Verizon. Verizon has tried many things to get it to work but concluded I would have to reboot the whole system - that means losing all my data and seems very extreme. I don't want to do that.

My husband's gate code (Verizon) work as do all the other residents numbers. It seems to be only me. Have I turned off something in my settings or how was this resolved by the other people who have had this problem?

My phone is an iPhone Pro Max. Service provider - Verizon.