To top up your EaziSMSPro balance, all you need to do is visit our pricing page here. On this page, the various packages with a link to purchase them can be found there.
Also, if you are finding trouble with this, you can do a direct mobile money payment to 0592209201. The account name is Bright Nkrumah. Make sure you use the phone number you used to register on EaziSMSPro as the reference for the payment.