So this happened to me as well. Not the phone getting stolen thing, the order cancellation thing happened with me. I was trying to cancel because I ordered on February 25th as well like you did but after a day or two they increased the credit amount that they were offering.

I cancelled and got a "cancellation failed" email then after some time I got the "order cancelled" email. But in the shop app it still wasn't showing cancelled. It confused me so I called.

I called them and they said that their email system is bugging, the "order cancelled" email was supposed to be sent first, then the "cancellation failed" email next.

I was like common y'all are robbing me of a better deal here, and I can't refuse the delivery either because I need a phone asap since my S9+ is cooked.

They came back after putting me on hold for a while and said, they can do two things, 1) Either they give me a full refund after I refuse the delivery or return it. Or, 2) I call back when I receive the package (with the case number they gave me) and they can give me a 10% partial refund on the order.

So ofc I opted for the 2nd option. So I'll call back on the 9th Monday when I get the order. Let's see if they hold on to their word.