Это не срок блокировки средств, это чарджбек.

вот выдержка из правил мастеркарда, можете перевести гуглом

Failed Travel Merchant—Intra-EEA and Domestic European Transactions Only

Chargeback Condition.
For Intra-EEA and domestic European Transactions, when the cardholder contacted the issuer claiming a travel service has not, or will not, be provided, and when the merchant is seeking protection from creditors, insolvent, bankrupt or in liquidation, at least one of the following conditions must be met: 1. The travel service was covered by a bonding authority or similar scheme according to local law, and one of the following: – The cardholder (or traveler) requested reimbursement from the bonding authority or similar scheme and did not receive it, or the claim was declined. – For Swedish Domestic Transactions: no additional requirement. The cardholder (or traveler) is not obligated to request reimbursement from a bonding authority or similar scheme prior to the issuer raising a chargeback. The cardholder (or traveler) does not need to request reimbursement from the bonding authority or similar scheme if the merchant, bonding authority or similar scheme publicly states that the bond is insufficient prior to the chargeback. 2. The travel service was not covered by a bonding authority or similar scheme according to local law, or neither the issuer nor the cardholder after reasonable effort can determine whether the travel service was covered by a bonding authority or similar scheme according to local law.

Time Frame.
One of the following:
1. Maximum 150 calendar days from the latest expected service date, whether the bonding authority or similar scheme responded or not. The issuer must wait at least 30 calendar days from the date the request was sent prior to processing a chargeback, unless a negative response was received, in which case, the chargeback may be processed upon receipt of the negative reply.
The following exceptions apply:
– For German Domestic Transactions: Maximum 240 calendar days from the latest expected service date, whether the bonding authority or similar scheme responded or not. The issuer must wait at least 60 calendar days from the date the request was sent prior to processing a chargeback, unless a negative response was received, in which case, the chargeback may be processed upon receipt of the negative reply.
– For Polish Domestic Transactions: Maximum 540 calendar days from the Central Site Business Date, whether the bonding authority or similar scheme responded or not. The issuer must wait at least 60 calendar days from the date the request was sent prior to processing a chargeback, unless a negative response was received, in which case, the chargeback may be processed upon receipt of the negative reply.
– For Swedish Domestic Transactions: Maximum 120 calendar days from the latest expected service date.
2. Maximum 120 calendar days after from the expected service date. In all cases, the issuer does not have to wait for the latest expected service date before processing the chargeback. A chargeback may be processed immediately upon learning the travel services will not be provided to the cardholder (or traveler). The issuer is still obliged to meet all other applicable chargeback requirements, such as a request for reimbursement from the bonding authority or similar scheme.