CANNOT GET MY NEOTEL PHONE OPERATIONAL AGAIN

I ran out of airtime on my Neotel phone, and went to buy a R100 voucher. When I tried to load it, I got a message saying that there was an error (presumably in the code). I tried a number of times, with the same result. I rang the call centre, explained the problem. The serial number of the voucher was checked (and it showed that the voucher had not yet been redeemed), but the operator could not help me. Told me to ring another number, which did not ring at all. I rang the call centre again, only to be told that my phone period had "expired". (I had no idea that they had an expiry date). However, he would hand the problem over to another department, who would extend the expiry date, and I would have a working phone in 2 hours. Its now 2 day later and no working phone. My previous Neotel phone stopped working, and I was told by the call centre to throw it away as it was no longer supported. Is Neotel deliberately trying to get rid of its customers?