I set up this camera while it was pointing at a blank wall about 1ft from the wall so that I would be able to test out motion sensitivity etc using the free trial of 15 min of recording

You have to buy the free trial data to see the free trial data

I called support and they told me my free trial was used up and I would have to purchase a new data plan if I wanted to add the camera back

First, let's talk about the data plan (forget about the storage cloud space for now) free trial only gave you 15min of video