Messed up shipment and ignored on refund request

I am a long time customer that send at least 2+ packages a month. I currently have an issue where I booked a locker and when I tried to deposit, despite having to return multiple times due to no space, the locker then shows the PIN does not exist. I logged this with the chat help desk and eventually found out that my Waybill was used with another package, not even sent from my area let alone province. I had to book a new shipment to get my package sent to the recipient. I need to get a refund form the messed up shipment, but am now being ignored on all channels of communication. If I cannot get any answer or my refund I will log this with the Courier Ombudsman. Probably start using Postnet again as you don't have to worry about lockers having no space.