As an example; I had a dedicated server that I was leasing that I wanted to upgrade, the sales tech noticed that the plan I was currently on had been retired/replaced and credited my account with difference of what I had payed vs the new payment tier which amounted to six months of billing on the upgraded server. You can't really put a price on that kind of honesty!
Why didn't they proactively inform you that your service was retired and there was an alternative available?
It sounds like this must have been going on for a while to be worth 6 months of service in difference alone.
I left 1and1 close on 2 decades ago. If you consider this a story of good service, then I would suggest you try some other provider.