Very Poor Upgrade/Billing support experience

I Upgraded my line at the beginning of the month and had to obviously pay a pro-rata amount as expected. BUT then they went and butchered my account. They cancelled the invoice that I paid via debit order. Then created a new invoice that was for the full amount and run another debit order. Took 3 days of back and forth to get them to fix the account. NO apology from their side or saying that they have fixed the error on their side. They just finally said your account is up to date. BUT when you go look at your services it still said suspended.