4k DVR Box

I just ordered replacement 4K boxes, Currently I have a DVR and 2 extra boxes for other TVs.  I ended up getting 3 of the wireless boxes.  I haven't installed them yet as they state they use the on-line storage for recording.  When I check the on-line storage via a computer or phone I only have recordings from the past 4 months.  This is not acceptable for how we use our DVR.  We even pay an extra $10 a month for additional storage.  If all of our recordings are not going to be available, we would like to just return these boxes.  

Please let me know how to proceed?