£20 a month for 0.4MBs.

[#1]

I'd really appreciate some help.
When I joined Plusnet I had a broadband speed of 1.5Mbs (not fast I know, I live in the sticks), however, this has continuously been dropping and is now only around 0.4Mbs. I have submitted 2 fault reports/ asked admin on here for help (last one about 2 months ago and the previous one 2 months before that).
When I've asked for help, you have reset the line (?) and the speed increased to 1.0Mbs for a while. I realise the speed drops because it may be a bad line etc and is an automatic task but I'm coming to the end of my tether. I checked availability on my line on the Bt website and it quoted available speed as 0.75-2.5Mbs.
Is this a fault with the Bt line? I f so is there anything you could do to help me please as I think £20 per month for 0.4Mbs isn't reasonable.
Or, if it's my router causing the problem, I'd happily change that. Its a Belkin F5D8636-4 v2.
Or is the only option to have my broadband with BT (which would be a shame)?
Any help would be greatly appreciated.

[#2]

Hi StuMac,
Sorry to hear you're having difficulty. I see the last fault was raised in September. As your current sync rate is below acceptable levels I would suggest raising a fault again. This will be the best way to tackle your issue.
Jojo

[#3]

Thank you for your fast response (as always), the last official report was in September but the last time (November) I asked for help on here instead.
I will put in a report now thank you.

[#4]

Yes, I definitely think that's the best bet, as temporary fixes don't seem to be helping.