Level 2 unable to ring on their said day & time frame

I have been dealing with Norton's Level 2 for the past 12 months, and they eventually admitted that they couldn't fix the issue with their VPN running on MacBook devices. During this time, Level 2 set one of my devices onto Premium, as in New Zealand Norton can only support 3 devices on the Deluxe version. My Deluxe subscription expires on Sept 11, 2023 and Level 2 need to come back to me to offer and have all 4 devices to be on the Premium subscription. 

The problem I have experienced during these 12 months is Level 2 make arrangements to phone me on a certain day and time frame window, usually 2 hours, and have missed so many it is now into double figures. I am currently waiting for their call to make the necessary changes and verification, but with the expiry date due in a couple of days, I believe this is not going to happen. I will end up with 3 devices unsupported and desperately trying to fix up something that should have been done earlier. 

Also the different number of agents I have received phone calls from Level 2 all centre around speaking to me with a degree of arrogance, rudeness, ignorance and being treated disrespectfully. Are any other subscribers out there experiencing the same or similar thing?