Poor customer service

I went to the establishment on Wednesday to purchase a pair of slippers that were on sale and i was assisted by the store manager named Sfiso. He was so rude and unprofessional to me. The slippers i took had a different price that was not on the tag and the price only showed on the till, and his behavior towards me was hostile and i almost felt like i was blamed for the error on their side not matching what was suppose to be on sale. I was extremely disturbed by the incident as i am a frequent customer at the store. Such disappointment for a store manager to display such behavior where else he is suppose to be leading by example to his staff.