In millennium bank Poland every time I need to move a bigger amount of money they ask me for my handwritten signature which always fails to validate. Of course

In millennium bank Poland every time I need to move a bigger amount of money they ask me for my handwritten signature which always fails to validate. Of course the more I fail the more I get nervous about it and fail to draw my signature appropriately. If I need to move big amounts it is because I need to, like buying a house or something life changing. Several times I thought what am I going to do now? What is my appeal? The appeal is simple: ask to change the signature beforehand and the proceed with the operation. Damn stupid. It is like presenting my authentication token, failing and then escalating my privileges to obtain the higher order verification token required.