There are a few different places you can find social media management services, these include:
There are lots of different groups on Facebooks where freelance digital workers offer their services. Social media management is in high demand at the moment, so you will find a lot of posts from freelancers with varying rates.
Fiverr is an online marketplace which freelancers use to secure ‘gigs’. When it originated, the concept was that things cost $5 but that isn’t the case anymore, you may be able to use to find a social media manager, but its highly unlikely that it will cost $5.
Google searching will help you to find more established outsourcing companies similar to this one https://www.whitelabelseo.com/ . White label marketing and other companies of a similar nature are usually reasonably priced and offer a hassle-free solution to finding social media management services.