Bad service and no communication!!

I have used the app a 3 times, and it worked brilliantly. I then placed a repeat order on Wednesday the 29th of March expecting instant delivery as this is what they promise. I then receive a response saying we will deliver on Saturday. I rep**** saying this totally unacceptable. I had to follow up with them as they never come back to you to find out when my order will arrive. They promised the following day (30th) as they just received stock. The order never arrived on the 30th, I received my order at 18:00 on the 31st and it was completely wrong. It is not the order I asked for (and it's a repeat), it's not even the same brand.Never again!!!!!!!!! Im waiting for the exchange!