Help understanding first bill and £300 deposit

[NOVATROOP77NI]

When I look at my bill it looks like it paid but nothing left my bank account yet or manual via card I did have to pay a depoist of £300 at the start of contract due to poor credit raiting but said would get it back if paid on time and just a tad worried.

So what gives here

[MI5]

@NOVATROOP77NI 

It may not show in your bank statement until tonight when they run the system updates but it does look like there has been a handshake for the money between O2 and your bank.

You can request your deposit back on your 4th bill after 3 payments have been made in full and on time.

[NOVATROOP77NI]

It look like i missed the 22 payment but I paid it today will that still honour the return  of the £300 what does on time mean is it the date of 22nd or does o2 try to recollect a few days after.

[MI5 · Accepted solution]

@NOVATROOP77NI 

Up to 4 days is usually OK

[NOVATROOP77NI]

Does the depoist  come back to u on on ur airtime bill just?

[MI5]

@NOVATROOP77NI 

It goes back onto your account as credit which can be used to pay your airtime bill or you can request it to be withdrawn back to your bank account.