Sounds like there's something wrong with their system!! If you've changed doctors someone there must have you details written down so they can find you in their deducted list so they can text you! That's mad and completely against protocol.
I'm glad your new place is better though. It really does make a difference. There's white coat syndrome which can cause BP to be really high - sometimes I have it. It's where being at a doctors or having an appointment can make your body anxious and cause the spike in pressure.
24hr BP monitoring should be able to determine that though. Hopefully it's just something simple like that.
Let us know how you get on.