bad service

I come to pick up my laundry that day and I always pay cash in advance for this dry cleaning company cause I get 5 persent of on cash payment and early payment the lady at the till said suddenly I didnt pay and maid me looked like the bad customer now the slip she printed for me stated that I didnt pay but then I said to the lady at tye till that she asked how am I gonna pay and I say cash and I asked her if she gave me the 5% promotion she said yes on that day when I took my laundry in so iam confused the whole amount is outstanding of 119.95 that I payed for I payed for that service already and the manager called me up again and said his direktor is getting impatient with me so they are bulling tye customer while it is not the customers problem so Peter can you help ke in this matter I feel abused by this company and I feel that this lady at the till let me walk out of that busniness door without leting me know of the payment I maid so that business is leaving the customer in the dark and they are taking the customers money I suspect the lady took my money at this moment I feel I just wanna pay half of the 119.95 amount so it is 60 rand and the business payes the other half becau