Poor customer service for order number ***

I have been buying products online for years and never experienced any problems. I purchased 3 for 2 slow mag fizzies online on the 13th of June. I was not very worried about the delivery of the order soon because there is a notice on the website saying the order will be delayed. On the 18th of June I received a message saying the order for slow mag has been refunded. I phoned Brooklyn branch and I was told that they do not have stock. I told the lady that I'm not in a hurry and why they never phoned me before making a refund. The lady **** and said they phoned me. I never received a call from Dischem. When I was still talking to her, she hung up the phone. I'm requesting slow mag at 3 for 2 price. I do not mind waiting for the products