I wish I had read the reviews before doing a beer ...

I wish I had read the reviews before doing a beer study with them on November 20, 2019. I was told by my recruiter, Mike, before I did this study that I would receive a PayPal payment of $100 within two weeks of the study end date, which has already passed, and I have not been paid yet. I have contacted the recruiter, Mike, who denies telling me on the phone I would be paid via PayPal within 2 weeks. I will never do business with them again if this is not resolved as soon as possible and paid as promised. I have written to the Better Business Bureau to help me resolve this issue.