anyway no matter which to which. i topped up 6 times from 30.12.21, from these i bought

• 1 prepaid M
• 2 pack XL
• 2 return debited 

there's still 1 top up $ left. isn't it 

I see

6 top-ups : (2) + (3) + (5) + (6) + (9) + (11)

2 return debits : (8) + (10)

4 packages booked: (1) + (4) + (7) + (12)

By the way: I am not an o2 employee. I am just an o2 customer like you. I have no way to check the details in the system.  Just trying to understand the informations you are posting here.

I think @o2_Andrea (or another employee) will check your top-ups, bookings etc. in the next few days for correctness.

sorry about that i thought you are one of the staff from O2 and thank you for your kindness ^^

Dear @pui yee tsang ,

on December 5th, you booked the o2 My Prepaid Data Pack XL, which costs 19.99 euros. The pack was paid for by direct debit with the pack fee. Remaining credit 0.06 euros.
On December 30th, a one-off top-up of 20 euros was made by direct debit.
Then the o2 My prepaid M was ordered directly for 14.99 euros. There was then still 5.07 euros in credit.
Then a one-off top-up of 20 euros was made directly. Credit left: 25,07 Euro.
On January 1st the monthly top-up of 20 euros took place. Credit balance 44.98 euros.
On January 2nd the Surf-Dayflat Voice was booked for 0.99 euros. Credit left: 43,99 Euro.
The packing fee for the o2 My prepaid XL from 19.99 euros was due. Credit balance 24.00 euros.
January 12th charge back of 20 Euro (were charged back by the bank) Credit left: 3,82 Euro.
Top-up with low credit of 20 euros by direct debit. Credit balance 23.82 euros.
Januaray 20th another return debit note of 20 euros (were reversed by the bank) Credit left: 3.82 euros.
Top-up with low credit balance of 20 euros by direct debit. Credit balance 23.82 euros.
Pack order of o2 My Prepaid Data Pack XL for 19.99 euros. Credit left: 3.83 euros.
On February 6th one-off top-up of 15 euros by direct debit. Credit left: 15.05 euros.
Pack charge for o2 My Prepaid M of 14.99 euros. Credit 0.06 euros.

These are the dates when it was booked with us. The small differences in the credit balance are due to chargeable uses, which are also deducted from your credit balance and which you can find in the EVN.

So for me it looks fine. If the dates for your debits from the account differ somewhat, then please see if you can find the sums and then allocate them, even without the date.

Thanks to @tearsbeforecrying for the support.

Kind regards,

Andrea