I feel like every two years I need to call my carrier and complain if I want a decent deal. They will do things like upgrade my plan on their website to have 10 extra gigabytes of data but won’t upgrade me to it until I contact them. There’s also all the new member exclusive deals that I feel make it impractical to just sit on one plan for an extended period of time.
I just switch providers, it’s easier to get a good deal than by staying and nagging customer support. Though I currently pay €10,- with my current provider because I also have fibre with them, so I’ll probably stay with them for the foreseeable future.
I switched ever couple of years.