Terrible Experience that has really damaged my business

I was using Bill.com for invoice collection. When the account first opened they were holding some of my larger ACH transfers from my clients until I could provide additional bank verification. I provided the information, the holds were released and I was promised this was a one time verification. A few weeks later when 4 client payments were to be deposited in the account, they were not. I checked on the account to make sure there was no hold and there were none displayed. I contacted their customer service and was told they were on hold even though it didn't say it anywhere. Over a week of having my client payments needed to pay my due payments for my business they said they wanted verification information again. Nothing was said to me about this when the payments came in, only until after they should have hit my bank account and I asked. Finally they said they would not release my payments unless I provided my confidential client contract which I would not do. I had to have them void the charges after over a week and go back to my customers to ask them to resubmit payment while I scramble to find a new ACH payment processor. I may lose my largest clients as a result of this. As I have been reading after researching this more, it seems they intentionally hold payments longer than they should collect additional interest revenue. [I believe] they are a terrible company to work with and I highly recommend avoiding them.