Useless customer, feel like nothing

Standing by a till where there is no line, waiting for the customer to finish in front, just to come to the till and the cashier says go stand by another queue which leads to another till. The cashier still calls the customers from that queue to stand in front of me. I call the manager, the manager still says it's fine. One line leads to two tills he (Molefi) says. I leave my trolley by the till to go to the managers office, I ask him to call head office so we can resolve this issue, he says I must use my own phone. I call customer service in his presence, the first consultant also agrees with the manager that I must stand at the back of the queue of the other till, I explain the situation and she said she will send a email so the cctv footage can be attached. While I wait for the email, I call again customer service, the second consultant says it's wrong, there is no thing as one line for two tills, so the second consultant told the manager that I must pay for my groceries but when the cashier was called to assist me, she said my groceries is packed in the racks and I must give a shopping list instead. Terrible experience at ShopRite, humiliated just for buying my groceries. I'm a regular customer and still get treated like nothing. When I told the manager, I'm a regular customer and my money is not good enough here, he told me the other customers also have money. So I asked him so what you saying is I mustn't buy here then, I must rather go to pick n pay then he kept quiet.