The number of chargebacks you can make is determined by your bank or credit card issuer. Most organizations, on the other hand, only allow a maximum of 1% of all transactions. This equates to around one chargeback for every 100 successful purchases.
If you wish to increase the number of chargebacks, phone the credit card company or go to an office in person. If you try to get too many chargebacks, they may flag your account as fraud and refuse to work with you in the future.
If you truly need more chargebacks, make sure you have as much documentation as possible to indicate that there was a fraud and that you need to file more disputes.