Not getting what the contract states

I upgraded my contract - it provides me with minutes, data and sms'. My data, etc. is provided at midnight on the 20th of each month. Two months in a row now I have not received my sms'. When it happened the first time (20 Feb) I emailed Nombuso. She never resolved the matter. When it happened the 2nd time - I emailed her again providing a screengrab showing that the sms' have not been included. I am yet to receive a reply and have the matter resolved. I am currently paying for something that I am not receiving. I am due 400 sms'. Please contact me urgently to resolve this matter before I take legal action for breach of contract by Mtn.