Disappointing Service

The slip I received is saying I ate things I did not eat. I had scrambled eggs and bacon and Hot Chocolate. To my surprise my friend who had the same scrambled eggs and bacon paid R60 and I paid R120. My slip is saying I had a ****in, bacon and avo which I did not have. When I asked I was told it is grouped under 1 thing. I accepted the explanation which doesn't make sense until I saw that my friend ordered the same thing but her bill was R60 how is that fair? and this no menu thing for breakfast is ridiculous