I just bought a Blackberry Curve for Nextel from Craigs List. I inserted my SIM card and the phone makes calls and all, but I cannot receive texts nor can I access the Blackberry device apps. So, i called Nextel to activate the phone and they told me the phone was still activated under another account. My attempts at contacting the seller of the phone have been futile. How can i go about getting this taking care of or am I out the money i paid for the phone?