I have used the translation "You were followed by them.", and it was rejected. I have made a report to be added.
Sentence suggested by Duolingo:
I know what you felt since Indonesian doesn't have tenses. However we use an easy-enough time aspects. To master Indonesian I highly recommend you to add some Indonesian in your social media because that will be a best learning method
"you are being followed by them" or "you were followed by them"
This is a literal translation but the English is awkward.