Garmin refuse to take responsibility for bringing card info

A month ago I did an online purchase on the Garmin online shop. Last week Garmin send an email stating that customers who has bought online, personal details including card numbers and cvv codes has been bridged on their online portal. Yesterday my account has been cleared out by unauthorized transactions. I have mailed the issue to Garmin on *** and *** for support on this matter but they refuse to respond to my query. Surely Garmin must take responsibility for bridging valuable data like card info. I expect Garmin to reimburse me for my loss.