Congratulations on becoming a Super Recruiter. 👍
Amazing how quickly you got there!
Sometimes SIM increases happen automatically when you have a high Activation ratio.
If the automatic increase does not happen, you will need to ask an agent.
When asking it is better to give a brief explanation on how much plan to introduce new members, rather than just asking for an increase.
You order a Box of 50 SIMS the same way as your order SIMs to your home address, https://www.giffgaff.com/orders/mgm you just select 50 as the Quantity in the dropdown menu.
You can find out more info about being a Super Recruiter at: https://www.giffgaff.com/super-recruiter