Family Dollar complaint: Not wearing mask and be locked in side store

My name is justin I went to the family dollar located at 627 burnside ave Easthartford ct 06108 store number 11656 on November 1st between 1:00 and 2:00 pm. I walked in the store and noticed casher did not have a mask on. I went got my thing and got line. I saw that the cashier was still not wearing a mask. I politely asked him if he had a mask he said yes. I said can you please put it on he said ok and proceeded to continue to ring out the customer. then walks over to the next station to put his mask around his chin leaving his mouth and nose not covered at all. I said can you put the mask on correctly he stated that he did not have to and that I could leave. at this point I pull my phone out and start to record him. The manger and another employee walk over to me and tell that I can not record him I said yes I can then the person not wearing a mask starts to approach me telling me to give him my phone while the store manager locks the front door so I can’t leave I was able to get out of the store while the employee’s follow me to my car I have all this on camera as well as the store having this hole incident on camera. I have tried to report this incident to a district management office but am not sure how to get in contact with them. I will not be returning to this location. I hope actions are taken against responsible employees as well as acting manager at that time shes the one who locked the store.