UK Based with House in Portugal. I Need Support With My Account In English Please

The situation summary is: we have NOS WiFi and Mobile. Our current contract comes with 3 WiFi extenders or “Superpods”. We wanted a 4th pod to get better coverage upstairs. NOS told us that our current contract only covers 3 pods and we need to upgrade to a new package to get the 4th. This would cost more. Having taken so long to get to that point we verbally agreed but on reflection don’t think the extra cost is justified. I had an email with contract documents and a link to agree - I have not not opened that link. I believe there was a 14 day cooling off period. Their email is dated 24 August 2026. I am currently in the UK and would like ti cancel before the cooling-off period expires. Thank you.