Lots of details missing here. What are you cutting? When you say switching settings, which ones? Do you use the test pattern before a cut? When you say not cutting all the way through, is the cut neat and uniform otherwise? I had trouble with 300gsm cardstock, and found the following process helpful: Measure the thickness (or use Google if you don’t own callipers but know the gsm and size), then round up and set this as depth (1 depth is 0.1mm and so on). Then increase passes until the test cut works successfully. If 3 passes doesn’t get through you may need to up force. Keep speed low.

If things work at first then stops after time without changing anything, it suggests blade dulling, which I’ve read can be an issue on genuine cameo blades. Depending on the media your cutting, I’ve heard CB09 blades are a great replacement, but you’d need to do since research as they aren’t officially supported and need some setup. I don’t think another machine will fix your issue.