TD Bank US Holding Company Credit Card Complaint

TD Bank US Holding Company Credit card department,

Credit line increase/decrease Illinois

My complaint is against Target Redcard credit card. I recently received a letter from them that they have lowered my credit limit because I was not paying it off fast enough and have balances on other cards, even though I make my payments on time every month. For months, they kept upping my credit limit, which I never asked for and as a result of this, there were hard inquiries on my credit rating from them which hurt my credit scores and now they want to lower my limit after they are part of the reason my credit scores have gone down? I find this unfair. I never asked for them to keep upping my limit and was not aware that their inquiries were hurting my credit. I plan to pay off this credit card and never use it again. I feel that they contributed to my credit score being lowered by these inquiries. There are also many other complaints about this card online and believe they should be looked into for this.