[bingo blitz] super stuck. 15 credits, less than a day left, and level 88

i really have no idea what to do! i have about 15 credits in my account and need to get to level 90. current level 88, which kills me. i am so close yet running extremely short on time; pretty sure i have less than a day or even a few hours left. i think i ran into a dead end, folks… even after all of the money i spent on this game :(

anyone want to be my shining light and give me a few tips?