Manual 11 ft. W x 9 ft. D Retractable Slope Patio Awning

we bought this Awning three months ago from WAYFAIR website.  when i open the box and try to install it, i found that the minimum installation height from floor to ceiling should be 11 feet. but my house ceiling is 8 feet. it could not be installed in my patio. when i return it, but it passes the returning period with 1 month returning policy.  if somebody is interested to it, please contact with me. 

buying price $600, selling price:$500. negotiable 

the website of wayfair is here: 

https://www.wayfair.ca/outdoor/pdp/mcombo-manual-13-ft-w-x-8-ft-d-retractable-slope-patio-awning-ndck1081.html

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