Spark ATM crash, I got burned....

I am writing this to express moreso my concern apart from my disgruntlement.

I was at a spark/capitec ATM by the Cape Town Motorshow and during a transaction of R350, the ATM lost power and after R50 came out.

A security lady in civilian clothing with a 9mm hand gun half falling out her Jean said that she could see the money stuck in the machine but told me that I had to go and sort out the shortfall of R300 at a capitec branch.

First of all, why dont your cash points have UPS's? In the most inconvenient of situations??

I asked your techie why he can't do a stock take on the machine and see it's R300 over and give it to me?

He just said it's not thier problem and I need to sort it out at a capitec branch and when I asked him if he could give proof that the ATM short paid me, he reverted back to the same response...

Now I have to take time out of my day (which I don't have) to ask for R300 back which I can't prove was not handed over to me.

What now?

Who do I speak to to get this sorted out which is going to cost me more in time than anything else??