Too large greenhouse frame damaged cover

[clkingtx]

I received a very nice early birthday gift of a greenhouse from my mom.
It was ordered from Amazon, and after over 2 weeks of back and forth
with the seller to get all the parts, we finally set it up. It seemed a little
tight, but I didn't think anything of it. We snugged the velcro straps to
attach the cover to the frame. We have some really high winds at times, so we
secured(somewhat, using twist ties) the frame to tposts driven into the ground
inside the frame. I will say here, my husband and I are both disabled, and there
are a lot of things that we are not able to do. We wrapped the plastic around the
bottom of the frame, taping it to the inside of the greenhouse plastic, securing
it with duct tape, intending it to be permanently affixed. By this time, it was
well past dark, we were all very tired(hubby, our 10 yo daughter and myself),
so we called it a night. The next day, I noticed the zipper wouldn't zip closed,
there was a strong horizontal pull, like when you try to zip jeans that are too
small. I thought to start with that maybe my husband had driven the tposts
too far apart, and so they spread the frame apart, but he made the marks for
where to place the tposts by using a paint can and spraying right inside each pole
we wanted to be supported. When I measured the frame, the measurements were
smaller than the measurements given in the greenhouse advertisement. I would
guess the cover is about 3-4 inches
short in height, and maybe 1 or 2 inches short across each the width and the length. I don't expect it will look very nice at all,
but I just want to get whatever use I can out of this thing. I have plants that I
need to get out of my house, and into the sunlight! Any suggestions would be
greatly appreciated, the less expensive the better. We are on a very low income,
but I do have very little bit of money to spend, I just want to make sure it covers
all that I need it to in the best way possible.
Any ideas???
Thanks!