Looks like TalkTalk just declared email bankruptcy:

Dear customer,

Thank you for getting in touch with TalkTalk Customer Relations.

We have received an unprecedented amount of email enquiries and unfortunately are unable to respond to your email.

We apologise for any inconvenience caused and look forward to returning to our normal level of service as soon as possible.

Regards,
TalkTalk Customer Relations.

I’ve had companies completely ignore me in the past but I have never received a reply to an email saying they have received too many emails to reply…