Crud wrote Whether you bought them yourself or not, you shouldn't get in trouble for having fake followers if it's not an amount that causes concern. Thousands of followers and you'd still be under the map, but, if you boosted your entire following to a noteworthy amount (50K+) then perhaps it would be investigated.

It is, however, never a good idea in the long run and only serves to hurt your profile. For every profile that bot follows you, that will be seen by the algorithm as a follower who is completely uninterested (as they won't engage or react to you at all) and that can become quite damaging to your place in the system.

So no, with such a small amount you won't get in trouble, but other than boosting your profiles follow number it will have only negative impacts and serve no beneficial purpose unless used properly as part of a marketing ploy.

If somebody really did that to you I'd advise going with the advice above mine. Just get the user out of your viewing and if anyone asks, tell them the truth about what happened.