Mcleaner

I have a problem, I'm a user for this program having bought 3 times the serial from your website.

There is one key that I was using for 3G Iphone and when I got my 3GS I requested if you can give me a new serial, but my mails were not answered.

I had to buy a new key for my 3GS.

Now can I use this key of 3G ( I have sold the phone and user does not even use nor does he know about mcleaner key that I bought) to another phone that I can provide the IMEI ?

I can convince other users to have Mcleaner and if one wants to buy I can ask you to change my 3G serial to another IMEI ?

Otherwise this key is useless and not used, please help me get it working elsewhere or a refund,

Thanks