Sprint Local Switching Pains??

We are Sprint local service customers and have been since the days when they were a small rural telephone service provider called United Telephone Service. They have served our area well. Alas, they are now spinning off their local business to become a company called Embarq. I am sure that the purpose of the spinoff is to make it easy to sell that portion of the business. It may be simply coincidence but ever since the announcement of the switch to Embarq, my local telephone number (land line) has been crossed with a Sprint/Nextel company number. This has created some very interesting phone bills and some very strange calls at all hours, including calls from Sprint International operators asking if I will except collect calls that are originating from outside the U.S. We only know 1 person living outside the U.S. and he does not call us collect. This has been going on for 3 months or more and has become a cause of stress and frustration with us. If anyone has suggestions on what our next steps should be, we would appreciate the advice. There have been 3 "trouble tickets" placed and supposedly resolved on this issue, but the problem remains.