It's not up to you to tell the ISP what upstream kit needs to be checked.
If more than one person in your neighbourhood is affected, tell the ISP that this is the case, and ensure that your neighbour also logs a fault.
The more people log the faults, the faster you'll get a result.
Whenever we get a broadband disconnect, we check with our neighbours and we all get on the blower. What used to take several days to resolve seems to be done within 24 hours!
SD