Threatening me on loans that aren’t outstanding

So Right after pay day I had an unexpected expense arise and decided lets get ahead of it and got a temp loan , 2 days later I have debt collectors phoning and threatening me , I sent them the proof that nothing was outstanding and that the loan was 2 days old. Didn’t hear anything back so assumed it was taken care of. Then once again getting threats so I decided **** it and took a loan elsewhere and paid FNB. Despite it being paid I’m still getting threats and harassing msgs and calls