Ghost data

I called and requested for a Sim Swamp the 22nd of January as 1 of my Sim was damaged, the 25 new data was put in (2G).i noticed on my app that the same Sim I've reported damaged its not being connected to a router as displayed on my app and my data was being used. I called the call centre yesterday to confirm whose router is the damaged Sim connected to by the agent was not sure and advise to investigate Today the 31st I received the new Sim, I inserted it and my data is 1.46 instead of 2G Who used it if the Sim was reported damaged? I have the damaged Sim and was not inserted to any device so who used my data? I just called and the agent rudely hang up on me? Is this were my money goes to a company that doesn't respect their customers? I paid for the services and I want my full 2G!!!!!