What should I do if a colleague is harassing me?

I usually work back shift and I was helping out in the day shift yesterday. There was another woman who looked like she was in her mid 40s she was sitting on the other table next time my table. I noticed she kept staring over to see how I was quality checking the plumbing pipes apparently I wasn’t checking them with enough force but I was taught that I just needed to give them a quick nudge to see if the washer would stay on the pipe. For that 2 hours she constantly complained about me to the supervisor and even my supervisor told me not to listen to her as she is hard work to deal with. But today I feel like not going back I felt extremely uncomfortable and intimidated to do my job.

today I’m not doing over time and I feel like not just going back to this factory it’s really affecting my mental health the atmosphere in that place is horrible

What should I do if a colleague is harassing me?
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