The phrase "to contact a lawyer" means to get in touch with a legal professional who can provide advice and assistance regarding legal matters or problems that you may have. Full definition
A: Contact your lawyer at once or talk to one if you haven't already. (pwlaw.ca)
You are in fact liable for these charges, and should probably also contact a lawyer if you can't pay them or find an easy way to share this with your former roommates. (law.stackexchange.com)
Please contact my lawyer about this debt, and do not contact me directly again. (consumerfinance.gov)