For the future I would suggest to learn to know the difference between a tailor and an alteration place.
If you don't have a trusted alteration place as yet, how about asking the RL store to do the alteration for you next time (assuming you bought the items new from the store)
The 7000 last is indeed a very beautiful last however I find with that last (and other JL last) the heel cup seems to be relatively big. This is the problem I find with JL. Despite having quite a few JL in the past, I had to sadly find them a better fitted owner.
You are lucky if your feet fits like a glove on the 7000 last.