Bad Service

I have been requesting an itemised billing on one of my contract numbers since Sunday 17th of May 2020 with every phone call i get informed 3-24 hours then i will have my itemised billing. So not being unreasonable i give them 48 hours then phone again just to find out my email address is wrong so i go through the process again and update my details 48 hours later i phone again to find out that my email was spelt wrong again but this time a different typo. This happened 3 times last week. On Saturday 23 May 2020 i reached out to a "service champion" on facebook messenger after giving me a lot of apologies he ensured everything is in order and i will recieve my itemised billing. Yesterday 25 May 2020 i phoned again i was transferred to a very proffessional champion that had the cheek of laughing at me and then ending the call so this obviously had my blood boiling. I then phoned again and was informed that my email was incorrect again and that a ref# would be sms'ed to me. Its now almost 12 hours later and no sms or email recieved. Its the worst service i have ever recieved and very unproffessional