Slow service from a 'fast fibre' company

Absolutely shocking service while trying to migrate fibre from one residence to the next. 20 days and it's not resolved! Finally, fed up, I've managed to cancel my subscription today but was told it wouldn't take effect until September. We've gone July with no internet, and now we're expected to go August with no internet as well! Why would a 'fast-moving', 'digital' company need 31 days to cancel a subscription and free up the line other than anti-competitive policy?