Shocking service from OneCart

Shocking experience this weekend. Shopper did not contact for replacements so order missing many items. Simple stuff like for example - butter! To compound the issue email, phone nor social Media accounts would not respond. Eventually call centre started taking calls again, they promised to sort it out and make a redelivery on Sunday. Nothing. No contact then they send an email saying me query has been resolved. It has not. These guys need to get their act together - at the moment shopping online direct with retailers seems a better plan.