My mom just rang to say there's a tinnitus advert currently running in the UK. I haven't seen it myself but I'm guessing from her description and the fact they say "text 'cure' to get a free guide" made me believe it must be this:
https://www.actiononhearingloss.org.uk/donate/we-are-taking-on-tinnitus-together.aspx/
Time to get donating.
https://www.actiononhearingloss.org.uk/donate/we-are-taking-on-tinnitus-together.aspx/
Time to get donating.