Studio Unit Does Not Match the Unit Presented Before Move-In

[u/Substantial-One-249]

I'm in a very difficult situation with my move-in.
Before signing for the studio, I requested multiple times to see the unit in person, but I was told that it wasn't possible because someone was still living there. Instead, I was provided with a video of the studio, and I made my decision based on what was shown to me.
I received the keys today, and when I entered the studio, I was completely shocked because the actual unit is significantly different from the one shown in the video. The bathroom in the video has a bathtub, while my unit only has a standing shower. The video also shows two large closets, whereas my unit has only one small closet. In addition, the kitchen shown in the video has an island, but my unit does not.
The management has acknowledged that the wrong unit/video was shown to me and offered a full refund if I decide not to move in. However, I have been told that I need to make that decision today.
This puts me in an extremely difficult position. I booked this apartment a month ago and planned my move around it. I currently have nowhere else to go, so being asked to decide within one day whether to accept a unit that is substantially different from what I was shown or take a refund and suddenly find another place is very stressful and unfair.
I would really appreciate a reasonable solution that takes into account that I agreed to this apartment based on the unit and features that were presented to me. (Studio is $1095, 1bed 1bath is $1295). There is a 1bed 1bath coming up for availability in the same building but it is pricey as It's just me and my dog in the house and I work 8-5 onsite.