Horrendous company (as you probably are already aware from all the horrible reviews everywhere) that does not deliver anything.
The tracking on the app never works, you got to sign up to change any delivery options but that would not matter anyway because the information on the app is always wrong. You may get a text and email to inform you of a 2h delivery window, but be prepared to wait for several failed delivery attempts because that too is a lie. Do not expect any live updates either.
No way to get in touch with customer support either - there is no live chat, no one responds to emails and when you phone up, it charges you 7p per minute and you have to get the supplier/seller to phone on your behalf. It's been one week and I am still waiting for a delivery that does not seem like it would ever show up.
Stay away from this useless company - appalling customer service.