Online supermarket

I use online supermarket often, I shop online often (we know what you are referring to when you saying shopping online. It doesn't sound natural to say I use the online supermarket) because I'm living I live (If you saying I'm living in Singapore it gives off the meaning that you are currently living there but don't permanently. On the other hand, if you said you live in Singapore, it sounds more like you are a permanent resident. I'm guessing you are from Singapore so saying I live would make more sense to the listener. I don't think this is a technical error because people would still understand what you mean but it just sounds more natural) in Singapore and it is too hot to go to the supermarket here. So A lot of housewives in this country are using it. But but  (You could have two separate sentences here but its easier to understand if it's one) it is still in its transition period now for the online supermarket companies. They sometimes miss the customer's orders and delay to deliver. or the deliveries get delayed (I changed "and" to "or" because even though both are likely to happen, they are more likely to happen independently, someone's order might get missed while another persons delivery gets delayed. When you use the word "and" you are implying that both happen to the same person at the same time)

side note: depending on if you are speaking or writing, using contractions such as changing it is to it's make the words sound more natural but since this isn't an grammatical issue, I didn't change them. just something to note!

I could also write this in my own words if you would like!

Good luck with your English studies!!!