I agree with Dick, have you troubleshot it to make sure it is defective? If yes, there's several option and brands you can chose from.
I bought this one years back from Amazon. It had good reviews, but there are newer versions out now. I did a web search on best tounge jacks and decided the Husky was what I wanted. It's overkill, but I figure for this usage more is better.
https://smile.amazon.com/Husky-HB450...web_3031206011