If you want to sell the account and quit Pyramining, you must sign the following message (use copy and paste) with the payout address and enter the signature in the field below. You should find the "sign message" function in your wallet.
The sale is final and can't be reversed. By selling the account you lose all the rights related to it.
Tell me in two easy words what exactly I must do to quit pyramining and sell my account? I have not english version of wallet, so I can't find exactly same option in menu. With screenshots, if it possible.