Explanation:

Correct Option : 5

- One cannot get "across" usually refers to conveying a message, not reaching someone.

- To "lodge" a complaint is correct language. But "across" is not suitable for contact.

- One cannot get "through" is correct when talking about calls or connection.

- To "write" a complaint; usually, complaints are lodged or filed.

- One cannot get "over" typically refers to overcoming something, not reaching someone.

- To "dictate" a complaint, though possible, sounds odd.

- One cannot get "along" refers to having a good relationship, not making contact.

- To "create" a complaint is not standard usage.

- One cannot get "off" usually refers to leaving or disembarking.

- To "file" a complaint is correct .