Levi smashed nine fours and three sixes upon his WP return to set up their run chase.
Dane Vilas (21), George Linde (20*) and Aviwe Mgijima (26*) also played their part as Province reached the target of 143 with three overs to spare.
Hardus Viljoen was Boland’s best bowler, taking 3-16.
Earlier, the Rocks recovered from 47-4 to post 142-6 thanks to 46 from Christiaan Jonker and Ferisco Adams’ 34.
Beuran Hendricks (2-28) and George Linde (2-13) shined with the ball for WP.
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