HSBC Bank Account Or Service Complaint

HSBC Bank account or service department,

Other bank product/service Making/receiving payments, sending money New York

My Bank ( HSBC ) constantly shuts off my credit card without any notice, after making a large '' payment. Large to them is around $200.00, which is not large to me. I make payments in this amount often, and to the same vendors. I understand if it has to do with Fraud Protection, but it doesnt. Usually when there is a case of Fraud on my card where a large purchase ( always more than $500.00 ) is made to a strange vendor, HSBC calls me and notifies me as they have placed a hold on my card. But in this incident, they have turned off my card without any notice and it was unpleasantly declined. I do not appreciate HSBC turning off my card or funds WITHOUT notifying me. It is wrong and inconvenient. Especially when it is an amount that i always pay to the same vendor.