Hey, No Problem at all, its sad to hear you've had the same issues.
Il give you an update of the saga so far, unfortunately its not good news..
Banggood sent through a replacement Racerstar V1 20A ESC as linked by alex above, but these do not exactly match the ESC on the wizard, they are version 1.1 and the wizard has version 1.2. IN BLHELI configurator the 3 original showed as ##20H and the v1.1 showed as ##30H.
The quad flew but the motor attached to this ESC would loose thrust on very sharp turns, so I went back to banggood and noticed the RacerStar V2 20A ESC had the correct part number advertised on the banggood site, it still is, but however when you receive them they have a completely different model number printed on the chip and again show as ##30H in BLHELI, the Racerstar V2 chip is also completely identical to the Ciciada 20A ESC sold by unmannedtechshop.
So I went through 2 different Racerstar ESC and neither were a completely correct match.
I ended up installing 4 Ciciada 20A ESCs in the end and everything ran fine, but I too had a dodgy motor that sounded rough, so I replaced them all with EMAX 2205 2300 KV redbottom motors as they were on offer.
After also replacing the FPV cam with a runcam eagle the wizard now flies great, but its no longer a wizard...
Sorry I know its not good news for you, but on the plus side, the wizard was my first quad, and man ive learnt a lot since breaking it, and finally fixing it. Making me wish id just built my first from a kit and not bought a ready made one.
You may have to spend some money to make it go again, but then you may have better luck than I did finding replacement ESCs that are a complete match.