Service delivery - Store Manager's poor attitude

On Wednesday, 24 October 2018, I bought a 9ct white gold ring and submitted it for resizing immediately. I was informed by the sales consultant that it takes 3-5 working days. yesterday, 30 October 2018, I phoned the store to follow up on the status of my ring and was informed that it will be ready for collection tomorrow (today). Today, 31 October 2018, I phoned the store and again asked about the status of my ring as I would like to collect. The store manager advised that it takes 5-7 working days and said it's hard for her to believe that anyone would tell me 3-5 working days. The store manager has a very arrogant and snotty attitude, insinuating that I'm lying and making me feel like returning the ring and shopping somewhere else. It's not like I'm asking her for a favor, but actually bought a substantial amount from her store and would appreciate some respect and kindness.