I'm assuming that taxes on advertising would be in line with or even a bit higher than most other taxes, like 20% or maybe even 50%.
You're talking about taxes maybe around 10,000% to multiply the price of Dove soap by 10x, if Dove currently spends 10% on marketing.
Yes, at that level of course advertising disappears and advertiser-supported businesses fold. But if that were the desired outcome, I don't think a government would bother with taxes. They'd just ban advertising.
But if we're talking about a tax like 40%, I don't think consumers would ever notice a difference in the amount of advertising. Products would just cost a little more and advertising rates would be a little less and ABC will just make slightly cheaper TV shows to offset it. You'd still have 8 minutes of commercials for every 22 minutes of content.