World book bolt program/ World book Charging me an earlier due date till finally took 2 charges in one month! Swagbucks offer company Internet

 I wrote them cause they are charging any day of the month, earlier every month, till finally I'm making 2 payments in one month! Is this illegal? Not sure but definitely unethical and I'll never buy again, never try World books! Here's my charges so far: January 13, February 10, March 10, April 10, May 8, June 5, July 3 and now July 28...payments will probably bounce since unethical and constantly moving UP my due date to earlier and earlier dates! I have another account where took payments January 23, February 21, March 20, April 17, May 15, June 13, July 10, and if they take August payment in that account I have no money now how IN THE WORLD CAN YOU BILL WHENEVER YOU WANT?! I'm gonna be so pissed off if i get a $30 bounce off cause one of these monthly payments hits my account and rejects as insufficient funds!