Terri, your post is really two problems, not one.
1) Creditors calling: Most people think that they can stop the creditor from contacting you, but that is not true. A CREDITOR can contact you pretty much without any restrictions. However, a DEBT COLLECTOR is different. They are prohibited from certain actions by the Fair Debt Collection Practices Act (FDCPA). One of their barred actions is to contact you at work after their becoming aware not to. You can read the entire FDCPA at
http://www.ftc.gov/.
NOTE: The FDCPA does NOT apply to the actual creditor, since it is assumed that they anticipate doing future business with you and wouldn't jeopardize that relationship by their actions.
2) Checks returned: This is UNRELATED to credit problems, unless you are writing these checks to the creditors. If so, they can still pursue the collection methods available to them PLUS they can pursue civil and criminal charges for your 'check activity'. Stop writing bad checks!! They are NOT excused by your credit problems.
In Mississippi, penalties for bad checks:
Civil: " Amount due plus additional damages of 100% on checks up to $25,000, 50% (not to exceed $50 or fall below $25) on checks on $25 to $200, and 25% on checks over $200."
Criminal: "Checks under $100 - a fine of not less than $25 nor more than $500 or imprisonment in the county jail for not less than five days nor more than six months or both. Upon conviction of second offense for check less than $100 a fine of not less than $50 nor more than $1,000 or imprisonment of not less than 30 days nor more than one year. For the third offense a felony regardless of amount involved, imprisonment in the state penitentiary for a term of not less than one year nor more than five years. For a check of more than $100, deemed a felony, punishment of fine of not less than $100 nor more than $1,000 or by imprisonment for a term of not more than three years or both."