Locked in the toilets

I went in to a KFC Lister Medical building, 195 Jeppe street, Johannesburg this morning aroung 06:35am. I was so pressed for toilet and there were about 5 people on the que, so I dicided to go to the toilet and the securitry guard stoped me from going in and said that they have a law that says I have to buy first before going in the toilet. I told him that I was pressed and he can clearly see that I am pregnant. I bought AM riser and the went into the toilent, when I try to open the door I was locked inside the toilets and couldn't go out. I called the store number on my till slip but no one picked up the phone, I started knocking at the door for someone to open for me but no one could help me. After 8 minutes a customer came and I signed to him that the door seemed to be locked, He went back to the security and got the key to open for me. I found your security guard sitting in the lobby drinking coffee and fatcakes. I felt so embarrased, I had a bad experince so early in the morning.