Poor customer and advisor support and too much downtime over 6 months on platform

I am an advisor and reseller for Sage Business Cloud accounting. Over the past 6 months Sage has become incredibly slow and hard to utilise. I have gotten to the point where the platform is not usable as it just times out. My other online packages work fine. I haven't had an account manager or anyone reach out to me from Sage. I am just a number in their huge system. All my rebates were and are being paid into the wrong account, the accounts department still have not rectified this. I have been billed and attempted to be billed for software I have cancelled years ago. I have tried to contact Sage support but they refer to self help and FAQs. To get to the point to interact with a human is so hard. I feel this is a typical corporate scenario where people don't matter and bottom line does. If I could do it all again I would have never elected to go with Sage. I am disappointed and upset, especially with the business I have brought to Sage. My whole account status is one big mess and no one has the guts or the slightest touch of care to fix anything.