Dissapointed

So, I have never been this angry at a company before. I am absolutely horrified at the way they have treated me. I logged a hellopeter query because their agent told me he will call as I have been trying to upgrade since April of this year. My laptop contract has been due for 2 months. The Hellopeter department had an agent phone me who promised to help me on Friday 10th of May. She was going to phone me on Monday 13th. Nothing happened, so now 2 agents are still going to get back to me. On Tuesday 14th of May, hellopeter followed up by calling me to find out if I have been called, and would call me back. 3 agents so far will call me back. I eventually phoned back Wednesday the 15th of May and an agent assisted me with the upgrade. The issue initially was that they didnt have stock, I said, I dont want to call them everyday about stock, they need to upgrade me and when they get stock send my upgrade. Anycase, I upgraded, so none of it mattered. I got the email quote, and that was the end of it. Today I follow up via the chat bot, its the 20th of May, and the chat bot agent tells me the upgrade was cancelled. I have in the 5 days since my upgrade received no calls on my phone, not an email, not an sms, i only have confirmations of the upgrade. I CANNOT BELIEVE that I cant believe the incompetence. Im in shock at the level of service and the amount of time it is taking to get this done. I don't know what more I am supposed to do :( Its a brick wall.