Very bad service

I've received a call from one of mono mobile consultant offering me a contract phone on the 29 November 2018.and everything was approved and also dedicated the administration fee....they said my device will be delivered with 7 to 14 working days but into my surprise I haven't received anything...when you call them some consultants gives you attitude.I'm now tried of call them cos they will be telling me same story that they put of stock.even today they still out of stock cos I haven't received any call and if you don't make follow up they won't even bother by calling you and explain or apologise.as my first time having contract with Mondo mobile I am not satisfied with their service at all...