Atrocious Client Service

I received poor client service of the Manager Shadley at Nike factory shop Kuilsriver Cape Town. I've been a loyal client and today were the poorest service ever received. Whilst standing in the line the Manager insisted me to go to the next cashier while my basket was already with another cashier i said my basket was already at the cashier. Shadley took the basket and insisted me to move to another cashier. His atrocious behavior was inappropriate. The manner in which Shadley address me were inappropriate. He humiliated me infront of other clients and speak to me in an inappropriate manner. Shadley knows I'm a loyal client and to question my loyalty and assume of *******ive motives is uncalled for. I did not expect this kind of behavior at a managerial level. I am pretty sure Shadley is ****** as i observed several times his behavior towards white people differ from black people that's just my observation. Nike Kuilsriver left a bitter taste in my mouth with a Manager that have no client centric s****s nor leadership s****s that hardly have a friendly approach face. I spend every month up to 12k at this store and to received this kind of service makes one wonder is it just for money or treating customers fairly. Lastly do Nike have a policy that states you cannot go to a cashier of your choice if yes where is the freedom of choice. This specific cashier gives me good client service at till points built conversation with me encourage me to complete the survey and i dont get this kind of service from the other cashiers thus my reason why I prefer her. Otherwise ups**** your staff to be more client centric.