Creep TD Pro

I can't seem to figure out what my old username and password were since i last played around June 2015. I had bought pro, but as of now I'm forced to create a new account to play again. I have the email confirming the payment, so how would I go about either getting my account back or transferring the pro status to the new account?

Also not sure if this is the right spot to post it in, but anything helps!

Also x2, I have no emails associated with the previous account. No matter which one i search, its just not there. I only have the paypal confirmation for the payment for pro status.