If the store initially did the install they may be able to send a technician out to assist you if not they may provide that service with a charge. In order to do it yourself here is where some geometry and Hands-On will coming to play. Purchase a level you may be able to get one from the Dollar Tree or even return to Lowe's and you will need to be able to obtain a measure of wood. Side note some machines come with feet that you can adjust you can tell me back and support it with a brick or something else and then manually hand adjust by loosening the feet and adjusting to your desired length. Hope this helps
At the bottom of your washer there are some adjustable legs that can skew inward or outward
Call the store
You need to call the store.
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