Then try to "jumper" solenoid. Use ANY metal, quarter, keyring, screwdriver to jumper the two large bare terminals on relay--the large stud to the "square" nut/ screw connection. This puts battery power direct to starter solenoid
Typically you scar the posts on the relay, posably making it hard to remove the nuts in the future.
The starter can produce energy like a coil when energized and under certain conditions, it can zap you like a coil. ( I did it on a ford starter, you would have thought i was holding onto a 120v wire)
IMHO starter relays are cheap enough to have a spare.