Guys, could you kindly recommend any reputable and safe marketing firms that will be able to assist me with everything there? Thanks.

Great information, I went to your link and saw. Good information I liked it. But now I have to know about billie Eilish Instagram followers and I need. Let's talk later. Thanks for sharing these details.

Timmy72, I believe that you need to check natural links because they are quite good, I have already used them and it was fine. Besides, you may check this ultimate guide to ahrefs new features because ahrefs is a very important tool in this sphere in case you didn't know it yet. Hope that I helped you.

I am not supporting any black hat method as you will get a short term result and probably you may not get any results.

Here are some Disadvantages:
Short Term Results.
BlackHat SEO is a Unethical method.
Black Hat Tactics are Spamming Tactics.
Your Website will be Penalized for the life time.
All the efforts are waste if your website is penalized.
Your website will be ruined from the search engines ranking list.

As an SEO expert now I am only focusing for white hat and some time grey hat. Recently we have optimise a new page https://mysleepyhead.com/sofa/

Dude, do you even know what does black hat search engine optimization mean? It's a disapproved practice that nevertheless could increase a page's ranking on a search engine result page. It actually breaks all the search engine guidelines. Besides all that, it's only significant in the short term, which is not that good. If you don't really understand that, you should call for some SEO specialists like the guys from https://partopia.ca/surrey-seo/ . They should help you out. I've been using their services for a couple of years.

Black hat? You should give us more details in order to be able to help you out. When it comes to SEO, there are countless techniques. A good option would be to contact someone from https://www.clientverge.com/ in order to have a general idea about this matter. Of course, everything is related to a budget. If money isn't a problem, then you're good to go and you have nothing to be worried about. You can even do SEO by yourself if you manage to learn the mechanism behind all of this. It's going to take a while, but you're going to acquire new knowledge

I honestly don't know any "black hat" SEO techniques. However, if you're looking for more of "unconventional" methods of SEO, maybe click-farms would help? They do cost money, though. As do ads on popular search engines such as Google and Baidu.