Suspended account

I have two contracts with the provider,when I found out that one was not paid I called and requested for a reference number so I could pay manually. I was given the reference number, I paid on the 10th of March and emailed the proof of payment. Friday 18th of March boom my phone was suspended, I called and I spoke to about four different agencies each not knowing what could be the problem. I again emailed the proof of payment. 19th I called spoke to two people, it was the last one who told me that I was given an incorrect reference, it was for the account that had been paid already. Now whose fault is it? I have an email that was sent with the reference that I should use. I have been calling and the only response that I get is \ I will escalate the matter to my manager\"..that's their famous line, all of them. When I requested to speak to the manager I was told to hold for over 30 minutes. I am a site worker, that means I depend on my phone 24/7. <br> I am not renewing both my contracts. I have never been this angry in my life. "