I’ve successfully reallocated limits with Bank of America with no issues. Moved $11K from my BBR to my Cash Rewards to give myself a nice $20K limit.
Sorry you had such a nightmare with this. I have to question why after 5 years of activity, BoA has kept you at such low limits? I only have 2 years of history with them and I haven’t had any problem growing my exposure from $500 to $21.3K.