2 year ban can be changed if you have a Partner equivalent refer you. You'll still need to wait 6 months, but that's not much.
Other alternative is to stay in the same company if you're happy and try to climb up the ladder. If not, look for opportunities outside P&G in a role that you're excited about. Anything that shows trajectory will help in securing the interview again
GMAT, CFA don't really help.
Almost all Tier 1 MBA programs offer great financial aid, services and/or scholarships you can be eligible for.