there are a million substances which taste horrible so you have no idea if you got ripped off or not - all you know for sure is that you have purchased something which tastes horrible.
This. No substance IDs. We can't ID what you have (or how much you have) just by a description or image you post on the Internet. This is a board-wide policy. We would just be guessing. Get a scale if you want to make sure you got the amount you were told you got and get a test kit or submit a sample to ecstasydata if you want to be sure what you got was MDMA.