user: LJS7WKWR2J I bought Data at 999 instead of 99...advise if what is over n above is refundable
agent: Seems you have used part of the data bundles. For reversal to be successful, the balance should be as purchased on M-Pesa.
user: 99/- of data is what I used as that is the option I picked on the menu but what I gave to you was 999/- there's a difference of 900/- Just checked my data bal.... It's OK.....
agent: Hi Iddah,we are only able to reverse the full amount of data bundles bought wrongly,ensure your data bundle .... ...balance is 3072 MBS,then alert us we reverse.

Customer is complaining that they bought data at 999 instead of 99 and advise if what is over and above is refundable. Agent updated that balance is 3072 MBS then alert them they will reverse.
### Instruction: Below is a conversation between a human and an AI agent. Write a summary of the conversation.

### Input:
user: LJS7WKWR2J I bought Data at 999 instead of 99...advise if what is over n above is refundable
agent: Seems you have used part of the data bundles. For reversal to be successful, the balance should be as purchased on M-Pesa.
user: 99/- of data is what I used as that is the option I picked on the menu but what I gave to you was 999/- there's a difference of 900/- Just checked my data bal.... It's OK.....
agent: Hi Iddah,we are only able to reverse the full amount of data bundles bought wrongly,ensure your data bundle .... ...balance is 3072 MBS,then alert us we reverse.

### Response:
Customer is complaining that they bought data at 999 instead of 99 and advise if what is over and above is refundable. Agent updated that balance is 3072 MBS then alert them they will reverse.