Nah, keep at it.
At your local cheap shop (pound store?) you'll probably find bi-carb based carpet deoderizers... all the better if they come with an attachment to help you rub it into the carpet.
There's also sprays and foams and all manner of stuff... these combined with the old elbow grease will make progress.
Try a few different kinds, and good luck!!
If I remember tonight, I'll take a photo of the one I found most effective when I moved into my unit.
"Do not force others, including children, by any means whatsoever, to adopt your views, whether by authority, threat, money, propaganda, or even education." - Ven. Thich Nhat Hanh
"Whether I were to preach in brief, Sāriputta, or whether I were to preach in detail, Sāriputta, or whether I were to preach both in brief or in detail, Sāriputta, rare are those who understand." (A I 333, Sāriputtasutta)