SUCCESS! At last and with a lot of badgering the dealer got my car unbound. No notification on my infotainment unit but suddenly I could bind my phone and all is well.
While I’ve been trying this, I’ve found the following ways to get your car unbound, I thought I should do a summary post.
Previous owner unbind - if buying an MG, insist that the previous owner unbinds from the car via their iSmart app. If buying from an MG dealer, check for binding and insist it’s unbound before you accept it. It will save a lot of grief.
Force Unbind via app - Attempt to bind to the car, and hit 'Force Unbind' when the app tells you that the car is already bound. Click ‘Yes’ to the following message.
The current vehicle has been bound by another MG user. If you confirm that you already have the ownership of the vehicle, Please continue the "Force unbinding" operation.
This operation will notify the prior car owner in the form of SMS, email and app message, and the vehicle status will enter the Unbinding Pending Period. During this period, the prior vehicle owner can actively UNBIND (unbind in advance), or REJECT (terminate the pending period). Please make sure your operations are legitimate.
I tried this repeated times over 3 weeks and it never worked for me.
What is supposed to happen is that after 72 hours (3 days) of no response the car will unbind automatically.
Requesting Force Unbind again may reset the 72 hour timer, so only do this once.
When the car is unbound you are supposed to get an alert message on the infotainment system.
MG Customer support can unbind the car for you but will require proof of ownership. Find the ‘contact us’ email address on the MG App (this is the best bet), or the ‘contact us’ of your local MG website (who never got back to me).
An MG dealer can ask MG Technical Support to unbind the car - this is how I resolved the issue in the end after a lot of pestering. When the car is unbound you are supposed to get an alert message on the infotainment system, but I didn’t - binding just suddenly started working.