Switching to SHAW

Hey all, so reluctantly I am being forced to switch to Shaw due to moving. So I went on the chat with them, and they said that the current occupant hasn't cancelled service yet. She said she would call them and get them to sort that out. Its been awhile and I have not heard back. Anyhow I was thinking and it shouldn't matter should it? Since its all based off modem MAC address of the modem, Correct? Or is this S.O.P for Shaw? Every time I have moved with telus I have had no such issues. Also is anyone aware of any promos Shaw has on the BB50 or BB100 They seem to not even try to compete with TELUS at that range. Really Just care about the upload but paying 90/month to get half the upload of my 50/10 seems well sad. Not that I have a choice in the matter.