Wow & flutter is normal for tape recordings - it's always there to some degree.
Remedy #1 - well not a remedy but can help- is to play back on the device it was recorded upon - particularly if the device is still in the condition when recorded.
Melodyne could reduce the pitch fluctuations if carefully done - like on a phrase by phrase if not note by note basis.


Cheers
rayc
"What's so funny about peace, love & understanding?" - N.Lowe