Marketing in any form, social media included, isn’t a savior. It won’t work unless you are any good at what it is your business does. It will work to some extent if you are anywhere from mediocre good to absolutely amazing good. But you really have to be good, and I am sorry if this excludes you. (since you are here reading I seriously doubt that.)
Take a computer repair shop.
You walk in with your dead windows machine, (I have a stack of them) and ask them to take a look at it. The guy tells you that it is $50 to diagnose the fatality, then they tell you how much to fix it. You need to leave it there for a few days and they will call you with details. You get the call and they tell you that E-Machines makes a really really really poor computer and that your power supply failed which short circuited the mother board. It will take $40 to get a power supply and a similar motherboard will be $50. You already paid him $50 and you decided that another $90 is better than losing the $50 and buying a new computer… so you pay $140 to repair a computer you paid $330 for 14 months ago even though the guy openly told you that it was a remarkably poorly made brand.