I have been paying for 5 months without any phone

I have vodacom contract for more than 5 years but the treatment is very bad.They sell to me poor quality phones.I upgraded in May 2015 but received the phone last week Wednesday and not the one i wanted.I took it for repair in Vodaworld today coz it was giving me problems.The phone i upgraded to they said it is out of stock,I decided to take Samsung Galaxy Core or S4 mini but Vodacom in Vodaworld they said they did not have stock, i just ended up taking Galaxy trend Neo because i did not have a lot of options.I dont have a phone now because i did not get a loan phone and i dont know where they will contact me when my phone is fixed.From May i didnot have a phone because they refuse to fix my phone and i also didnt receive my upgrade phone. Instead of paying R99 and receive R150 airtime i upgraded to, i was paying R154 of a dead phone and receive less airtime. This new upgrade i was suppose to receive R150 airtime and i did not receive it on the 1st Nov and they continue debiting R154.WHY?I DO NOT LIKE THIS TREND NEO PHONE IS A PROBLEM PHONE. I HAVE NEVER MISSED ANY PAYMENT I HAVE ALWAYS BEEN A LOYAL AND GOOD CUSTOMER TO YOU.