FULKRAM

I have had one of these interfaces for 2-3 months and I'm having problems. All the channels are paired, so channel 1+2 become L1+R2 on so on up to 16. For example. If I record a mono track just from L1 I get mono track in my DAW (I'm using Studio one 3.5 & reaper) But when I try to pan the record track to the right I get nothing and to the left it's just louder. As you can understand I'm not very happy. I raised this with them through their support page online and heard no reply. I tried calling them but their number doesn't work. I sent an email direct to their support email again today and am awaiting a reply.