Spark atm

6 months ago spark atm installed a capitec atm on my business premises after every cash load I noticed short payment like R100 or 50. I also notice the the atm stating that Der is 100 notes left in canister but only to find it empty. However the last cash load I got R1500 short when I questioned they told me they have sensors for every note dispersed I have proven to them how inaccurate the atm is. These atm are taking our hard earned money and paying us back wit our money. The company does not even send a technician to check but just reply no we won't pay you what is short. Even sent them pictures of the atm miss calculating the cash. I wish they could take their atm away