What is your budget? Instead of looking for someone to promote your business across social media, why not you hire a reputed manager here to do campaigns for most of the social media platforms. Recently match365 started a social media campaign, you may like to look at that to get some idea : https://bitcointalk.org/index.php?topic=5196117.0

Also, I like to suggest you to go through altcoins bounties board so that you may educate yourself about various social media promotions through campaigns.

If your business is a crypto based one then I highly recommend to conduct a signature campaign here to reach thousands of real crypto adopters.

Also, I believe you must edit your subject-line like you are looking for hiring someone to promote your blog in social media. Right now, it sounds like a discussion topic which is on that case belongs to marketplace board.