Security Finance Consumer Loan Complaint

Security Finance Consumer Loan department,

Vehicle loan Managing the loan or lease Florida

I have an auto loan with PFS financial -. My loan term is 42 months, my payments are $350.00 a month. I pay my payments monthly and noticed my balance keeps going up and now down. I did fall behind a few payments here an there. A woman from PSF financial came to my job threating me for payment and nonstop phone calls requiring payment. I check my payments to be on - on a monthly basis. I recently checked my car payments to be posted on - and noticed my monthly rate is now $480.00! I never received notice of this and am totally unaware as to why its now $480.00 and not $350.00 like it is in my contract. Attached are copies of amounts I been paying as of - 2016 until current. On -, it shows I did not miss any payments so I do not understand how my monthly payment when up, especially without my knowledge.