Activating Warid Weekly SMS Package Problem

I have a Warid prepaid connection and currently facing a problem in activating the weekly SMS package. I have followed all the instructions correctly and sent details to the correct SMS number. When I first send the sms, I would receive another sms which would state send WS and send it to 3333 and other sms's like this. Customer care was of no help.
If anyone else has activated the Warid weekly pack please help me in getting it activated.