I would suggest you to have a look at www.yocta.com
They provide affordable and reliable SEO Services for all your needs.
Best way to know a good SEO Company in your country is to do a local search. And if the company appears in the first page then I will say they are good.
Lately I mostly use https://linklifting.com/help/submit-website/ and I am quite satisfied with the effect so if you are in search of a good SEO company, you can consider this one as an option.