Incorrect online item delivered

I have placed an online order through the Woolworths app for a Men's sweater (please note it is not a multiple order it is ONE thing) - what I received were two x 10 year old boys school shirts. I have bought this on my account - so I am being charged interest on this item - I have made MANY calls to Woolworths online which have been escalated to the warehouse (spending MY airtime) but NO LUCK - I am still sitting with an incorrect item. Shame on you Woolworths - seeing you charge an arm and a leg for everything I really did not expect such bad service from you guys. Hopefully this will be sorted out soon as I am at my whit's end with the incompetence!!!!!