my server hosting fakaheda.cz provide VIP system where players can send SMS to activate something more than standard

my idea :

after player pay for SMS and send in format FAKAHEDA 99 pitilon

there is variable %NICK

system get 99 CZK money for SMS

then action is invoked from side fakaheda.cz . .. it is : notify me and only me via email and :

system automatickly do action ==>> use command on server

this command is linked with %NICK

this mean user pitilon with nickname pitilon buy VIP admin or something what was on sale

here are my idea : make that user pitlon /ref (referee role)

but i mean it is impossible to do it via rcon command

player sure must be online and on server logged in

then my automatic system on server hosting fakaheda.cz gives to nick pitilon a ref role (without need to know ref pass)

command to do it is now wanted

command like rcon /ref password to give it specific linked to user on server

now help me

or create some addon to do it like pk3 help me