Receipt not given after payment of service

<p>Hi. Just came out of a Vodacom shop. I went there to cut my micro SIM to put into my nano SIM. I was hoping that it would be a free service but I got charged R20 and I was not given a receipt after paying. I that how Vodacom does it or the person who assisted me just used his own discretion?</p> <p> </p> <p>I'd prefer to he given a receipt after making payment so that I know I'm not being cheated. </p>