Repairs do not take 3 to 5 working days!

I am extremely disappointed with the service of Samsung, The Grove. I handed in my cellphone for a screen repair on the 4th of August. I was told that it would take 3 to 5 working days (at most) for the repairs but after the 11th working day my cellphone still isn't ready for collection. Apparently there is a problem with the stock delivery, although no one can tell me what the problem is or when the parts will be delivered. I've followed up numerous times with the above being the only feedback. Worst customer service.