Failed calls after 1 ring & "pending" texts that send 100x



I sent a text to my friend at 9 am "marked pending" but yet she responded and then noted that she recieved the text 6 times ... then texted me back two more times telling me it wont stop sending but still marked pending on my device. So I tried to make a call to assure that I wasn't cut off because of my past due balance which I had made a payment an hour before this crazy stuff happened! When I went to call out after a second (1 ring) call was failed. When they tried to call back because I guess they got the call it rang on my phone once not long enough for me to try and answer ... help!