Confusing fee and slow service - Consumer Complaint for Shakeys

Hi Shakeys, I am currently here at Shakey's Paseo Sta. Rosa, Laguna today May 8, 2021 at 6:50pm. I ordered a group meal but the service crew named miles offered a different offer saying that he will increase my chicken to 8 pcs if I pay 2,200 instead. Then it went down to 2100. I paid in cash since they do not have card payment at the moment. The other service crew gave me a receipt for same order for 1,600 and change. The guy immediately returned and got my change and receipt saying that they did it wrong. They gave me my order without receipt. When I requested for receipt they insisted to give another person's receipt. I asked for the manager named Echo and he said that their POS is broken and they cannot commit how long will it take to give us receipt. So we requested for a manual receipt. After few more minutes. The orgjnal receipt with change was given to me explaining that he removed the payment for the card. Which is I believe will not cost me 800 Php. My transaction ended 7:40pm. Pls check on this modus. Let us work with honesty.