I've just noticed that I've been over paying on my bill by $5 each month. They must have created new cheaper plans at some point and I've been stuck on a legacy plan.
I asked them to switch me over to the new plan and credit my account for the time I've been over paying; but support sent me a blunt email that says to the effect 'We won't offer you a credit as that's the plan you originally signed up for'.
Do you think that's an acceptable thing for them to do? I'm thinking about switching to another provider.
My 2 cents-
is it acceptable thing for them to do? - yep, why not. They are technically correct in what they said. Is it the acceptable thing to do from a customer's service POV? definitely not. Do they care? nope. I'd assume if you were paying $5 LESS they would've been onto you from day one and told you the plan no longer exists and you need to pay more.
thinking of switching? - go for it. Maybe if you call them to disconnect and state the reason as to why you're leaving they might offer you something. Even then, no need to stay.