What if someone is spoofing my number and making calls to random people?
As the calls are not coming from the 8x8 platform we are unable to provide any information on who is spoofing your main line number to use it as their on out caller ID.
The next step would be to contact OFCOM, with the examples callers have given you of when they have received the calls and ask OFCOM to investigate.
If then they may be able to assist further into finding who is generating these calls.
You can also find more information on UK Complaints Code of Practice (PDF) for how to get in touch with OFCOM.