what is the email address

[PCBB1]

what is the email address for customer support for cancelling a subscription please

[PandJ2020]

you cannot cancel (entirely) via email.  (Confirmation is required which cannot be done via email)

it's best to call.

[Daniel0210]

@PCBB1 
To cancel all your TV subscription, if you’re out of contract you’ll need to give Sky the required 31 days notice. The latest T’s and C’s explicitly state you can’t cancel when still in a minimum term deal unless Sky agree. If they agree you’ll have to pay the remainder of your discounted term.

Select ‘Need more help’ at the bottom of the following link which will lead to contact details.
https://www.sky.com/help/articles/cancel-sky-tv#contact-leave
(Make sure the flag in the bottom right corner is the correct one ie; UK or ROI).
UK customer ~ The link may include an email link and also a Message Us option (which is normally available between 9am and 7.30pm).
ROI customer ~ it’s only by calling Sky Ireland or writing in.

If you are cancelling Sky Q, return packaging will be sent out near the end of your notice period. Obtain proof of posting and keep it safe and indefinitely.