Someone else gets to cancel my line, now i wait for over a week to get fibre again

Had very few issues with them over the past 2 and a half years, however a month ago the ISP phoned to confirm a cancellation request to Vumatel (not me). Turns out Vumatel swapped my address with another, and now my line has been off for a week, and they are adamant that the line was cancelled by whoever lives at the address they have on record. Now the ISP informs me that Vumatel will take a further 72 hours to reactivate it..... Pathetic.