What does due to lack of your acknowledgement mean?

The phrase "due to lack of your acknowledgement" means that something has happened or been done because you did not acknowledge or recognize something. It is often used to express the consequences of someone's failure to acknowledge or recognize something, such as a request, demand, or expectation. For example, if you were sent an email and did not respond to it, the sender might say that they took a certain action "due to lack of your acknowledgement."