Bottles's extremely poor service

I ordered some groceries from bottles. When the delivery came, only 7 out of the 16 items were actually delivered. When I contacted them, I was not given the choice for either a refund or for them to deliver the correct items, I was just told I will receive a refund in 7 working days. I received a pop up message from their app 5 days later saying that I will be refunded a specific amount. This amount is about R50 less that what it should be. I contacted them again to inform them about the incorrect refund value. I even sent them screenshots of the items that weren't delivered. They phoned me and admitted that the refund amount is incorrect and it will be rectified. Alas, this was not done. After all the messages and communication, they still refunded the smaller incorrect amount. Bottles is not to be trusted.