Double billing

On the 4th of October I received a new 5G 101 Router replacing the old oppo router, I made a request , the delivery guy refused to take back the old router saying he was not authorized to take it and that I have to contact rain regarding the Retrieval of the old OPPO router and I was promised that it will be retrieved and the *** the old oppo router is still not collected and I have not used it since we got the new 5G 101 router now Rain is billing me 2 Routers instead of one I am still waiting for Rain collect it or for them to tell me where I can drop it off and refund me since I e been billed double and I had canceled the other Router they also send emails saying they'll get back to me but they never do , this is really not on.