Most frustrating experience I have ever had!

This is the most frustrating experience I have ever had. I have spent more time on the phone in the past 3 weeks than I have in my entire life. I have sat on hold (WASTING ALL MY AIRTIME), been promised help and had multiple useless email conversations that have NOT HELPED AT ALL.

I have just moved into a new cottage. On this property there are 3 cottages in total. They have told me multiple times that there is another ISP at this address, and that I need to get a cancellation letter in order to proceed with my order.

THE EXISTING ISP IS FROM MY UPSTAIRS NEIGHBOUR'S FIBRE. I CANNOT CANCEL MY UPSTAIRS NEIGHBOURS WIFI??? I have explained this countless times. The person on the phone tells me they understand and will proceed with my order. Low and behold the next day I get the exact same email and have the exact same conversation with someone who cannot help me. IF YOU CANNOT HELP ME STOP WASTING MY TIME AND TELL ME TO LOOK SOMEWHERE ELSE FOR FIBRE.

Do not use supersonic unless you enjoy repeating yourself 10 times to different people who cannot help you.... Or unless you want to age 25 years in the span of 3 weeks.