How to delete untrusted trust certificates?

How to delete untrusted trust certificates? I’ve attempted to delete them countless times with no resolve. I’ve been accompanied by an extremely persistent, uninvited guest on my iPhone for months with no assistance from Apple. I’ve deleted all of my accounts and factory resets my device at least 10 times yet I still have the pleasure of being completely restricted in the use of my device. I had an e-commerce business when this began and needless to say I’m afraid that my dream has been stolen from me for good. I honestly believe the individual(s) are beginning to become bored with me, as I wouldn’t be able to make this post without approval. Please help.