Is this a fair rejection please because i tried my best for this study

She said she will pay me 70p for the time i spend which was nearly 25 minutes. I replied back her saying that's not fair. I also said if my peformance wasn't good enough, i should have been asked to returned at the beginning. Do you guys think the researcher being unfair or is this my fault please ?

She said she will pay me 70p for the time i spend which was nearly 25 minutes. I replied back her saying that's not fair. I also said if my peformance wasn't good enough, i should have been asked to returned at the beginning. Do you guys think the researcher being unfair or is this my fault please ?