When esigning an agreement am i not supposed to receive a copy for it to be valid?

The attorney above me is correct in that a little more clarification and detail is needed to address this properly, however, if you e-signed an agreement, and the agreement had been countersigned by the other party already, then it would appear you have a valid contract for which you may be bound to (as well as the other party).
You do not need to receive a copy of the agreement for it to be valid so long as it was signed by both parties. I would contact the vendor that is giving the course to ask any questions or for a copy of the contract you signed. Webpage terms and conditions can be very different from your actual contracts terms and conditions.
If you feel like sharing any additional clarifying details or information, especially as to what exactly you are looking to do, it would be extremely helpful in answering your question.

I agree with my colleagues. I am guessing you want out of the contract. If it involves payment through recurring debuts, you may have some remedies.

Please clarify your facts, as it is unclear what actually happened. If you signed an agreement that was meant for someone else, it is very unlikely that you can benefit from that agreement or enforce it as you are not a party to that agreement.