You can acquire the service from the portal: Zakah.om and after being logged in.
1- Select an assistance program.
2- (Optional) Choose governorate, state, and/or district.
3- Click on "Show".
4- Pay to one beneficiary by clicking "Pay Zakah" or "Pay Sadaqah / donate" on the rightmost of each beneficiary,
OR
4- Choose more than one beneficiary by checking "add to pay" on the leftmost of each beneficiary, then follow the instruction.