Slow upload speeds for a full month now

I'm currently on Volt M600 Fibre Broadband which usually gives me around 40mb up and for the last month or so my upload speeds have been terrible and sitting around 25% of what they should be, sometimes as low as 3mb. I'm on a wired connection so there's no WiFi issues to contend with.

The service status website initially shows no issues in the area but when I call 0800 561 0061 I'm told there is and they're working on it but it's a complex issue. I've been given 5 dates for resolution – 9am on Oct 2, Oct 12, Oct 13, Oct 21 and finally Oct 27 but my speeds are still sitting at 10mb upload as of right now. I upload 14GB videos to YouTube 2-3 times a week and what used to take 45 mins or so is now taking 2.5 hours and sometimes longer.

It's a nightmare trying to actually speak to someone about this as I just get palmed off to WhatsApp and I'm given the same script over and over again. "There's an issue affecting your postcode, please wait a week and I'll make sure this is fixed".

Could someone from the team get in touch regarding this? I've been told it's a priority 4 outage, which I'm guessing is low priority as I still have internet access however a month without a fix is getting beyond a joke.

I've tested all of my kit and everything is working as it should but the SamKnows test reports my router upload as being slower than device which indicates an issue outside the house.

As far as I know there has been a ticket raised for this and that is F010968001.

Edit: One thing I have noticed is that YouTube and the Google speed test report slow speeds but Ookla and others report 40mb and uploading to Frame.io is at full speed too. Is this potentially a google/virgin media issue? These two tests were done within maybe 30 seconds of each other.