Online order

I placed an order on Tuesday 4 March my estimated delivery date was today 12 March, I have still not received my order, I contacted chat support on WhatsApp and the agent who assisted me tells me I will get my order Monday, I asked why and she informed me that it takes 5-7 working days for the order to be delivered, I told it's been 7 working days and she comes back and tells me that she has escalated order to IT asked what the ETA is and she tells me that I will get my order Monday I ask again why and she tells me she can't tell me when the issue will be resolved. I am not satisfied with the agents service and Mrp service. I just want my order as per promise