charged for cancellation and didn't eat my meal

I placed an order at MacDonald Maponya via Uber Eats on Friday 22 Sept and realised that I used an old address for delivery and I was struggling to amend it and then I decided to cancel the order...I then cancelled the order and later on managed to change the address to my current address....I received an email of my cancelled order Receipt....I didn't collect the the order, I thought I'll get a refund or credited to my Uber account as a voucher or something....I contacted the help chat and they sent me from pillar to post, had a chat with 3 agents with no directive response then decided to go to MacDonald Maponya mall and the manager there was helpful and made a call....The message I received was that I'll be partially charged but suddenly got another message stating that I won't get a refund since I agreed that I cancelled the order...The question is that how do you get charged for food you didn't collect? Where are the messages to pre-empted you about forfeiting for a cancelled order? This is unprofessional and ********* and a *******....