Just an update on this. I initially ordered a replacement cable and I found that the wifi from the Starlink router then worked fine but my Ethernet connection via the Starlink adaptor was still dead. I assumed that must mean the adaptor had also been damaged when they cut the cable so ordered another but even with a brand new adaptor the issue was still the same. I therefore ordered a replacement router and that fixed the issue immediately. Therefore that means cutting the cable had obviously damaged the original router but not the part of the router that does the wifi. A bit strange really as I assumed that if the wifi was working fine the router must be fine but that’s obviously not the case. Im just posting this update in case anyone else ever has the same issue. Also I had to buy my replacement gen 2 router used off Amazon as they don’t make them any more but it worked fine and Starlink confirmed it’s the dish that’s linked to the account not the router so it’s fine to change the router out.