Dis-chem says you are steel because you black maybe because my hair didn't look right

So today I went to dis-chem to do my brows like I normally do every third week. Walked in as Normal did them then proceeded to pay after I walked out the shop the security guard came at and ordered me to go back to the shop after that they claim thee saw me on the cctv footage *****ing a lip therapy thing they searched my bag and found an old one that I have been using all along since I always buy my things here they demanded a slip that I provided gladly because I don't throw away slips they then along with two white mangers came at me stating that I have ****** and they didn't have to explain themselves to me because they proof even if the proof was a old one that's almost finished its been almost 4 hours since I have been here. I spent almost R2000 monthly at the store today they want to say I stole something worth of R16 after spending almost R200