I hope that your problem is fixed permanently. Even though I like to kid Dave he's the master at improvising. However, if the bead is that badly damaged I suspect that any repair may be temporary. If the car is only used occasionally you are probably ok. If it was me I'd save up to buy another matching tire and use the damaged one as a spare. I hope you took pictures of the damaged bead. I would try and get some money back due to negligence.
John
John
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