The two actions are way different from each other and I don't suppose it is possible to combine them into a single recognizable and understandable term.
"Help" means asking for assistance or support, looking for an answer to a question, seeking a solution to an issue or a problem. Buttons with captions like FAQ, Support, Help are often reflecting these actions.
"Feedback" is more about giving an opinion about the software, providing a review or an overview, rating it, commenting on the quality, the functionality, the usability, and the performance of an application.
The best solution for you would be either to replace them both with just a link to Google Store where you would have the email for contacting you in case any help needs to be provided, or concatenate them as you proposed.