You can set your delivery or pick-up minimum order value. If customers haven't reach the minimum amount, they will not be able to proceed with placing the order.
How to set minimum order value
Go to Admin > Settings > Service & Delivery
Choose the delivery method that you wish to set the "Minimum order value"
Navigate to "Fee" section and change "How do you charge?" to anything aside from "Not applicable or settle later"
Tick the "Minimum Order Value" settings and set its value (e.g. 100). Click
Save.
