It’s very upsetting when you receive negative feedback, I’ve had it happen once and it really upset me (I later learnt that the client was a serial refund queen from other local traders and always tried to get refunds)!
After now being in the cake game a while, I’ve learnt you have to take a business approach to this type of thing and accept that you will never please everyone. You did the right thing and have offered the client alternatives, although from reading your post it doesn’t sound like she gave you any cake back to take a look at, you’ve now put the ball in the clients court as you’ve done all you can.
Don’t beat yourself up over it, just put it down to experience.
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