Synchrony Financial Credit Card Complaint

Synchrony Financial Credit card department,

Credit line increase/decrease Colorado

I would like to file a complaint against Walmart I was issued a credit card with a $500.00 limit and I had some financial issues and made a few late payments, and not the full amount, but always paid, then when I was all caught up and paying steadily on time they reduced my credit line without any notice at all so as I was paying down my balance they were taking it away which also affects my credit score when I called to ask about this with customer service they were very rude and basically said that what I get for paying late ... I would not only like to file a complaint but I 'd lilke my credit line to be returned to where it was when I started because i 'm still paying interest on the full credit line not my balance this is not right and Walmart should not be allowed to do this to people i 'm sure i 'm not the only one they have done this to ... Thank you