Allyson, your story seems very familiar on the Costas.
Too often these agents sell what appear to be luxury homes with marble etc often wonderful artist impressions too but in reality the finish, quality, and problems like snagging are not what was expected. Often the sites are much smaller and more crowded than the brochure pictures, yet thes homes are not cheap and in many cases as dear as in the UK.
It’s clear cut mis-selling but they all get away with it and leave people to sort out the hassle and the post completion blues.
Wish you luck though, it will look better when furnished nicely etc.
Hindsight says ‘always keep a retention of money back to cover snagging etc’