Well, so your primary problem is to repair your sql dump first! I would suggest to first test it locally - install mysql and try loading the dump to your server on localhost. It can be tough to fix such a large dump but if you are lucky to find a spot with the error you can use a hex editor like
Hex Editor Neo to edit the file (an ordirary notepad can corrupt data if the dump contains binary segments).
There is also one small hope - it is possible that you dump file contains queries too long for the server to accept. If that is the case you can try increasing
max_allowed_packet.
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