Please accept my apologies for the poor speeds you're experiencing. I'd also like to offer my apologies for the lack of support and information you've received. I've taken a look and I can confirm a fault under ref: F003699635 is present in your area and is being reviewed on the 29th March. This fault is responsible for reducing speeds especially during peak time hours. If you get back to us on or after the review date we will have more info for you.
Thanks for your patience,
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