Would assume they have not filed for a LMIA since they have not contacted you at all. LMIA processing takes months. The employer has to pay the fees, and complete a market assessment as to why they need a foreign worker and could not hire a Canadian or PR. They do not need information from you to file for the LMIA. After several months, they will receive a response to the LMIA request, and then you can file for a closed work permit.