Mental health services accessibility in urban slums of Isioko State, Libya, are often constrained by structural and socio-economic barriers. A mixed-methods approach was employed, including a survey of 150 residents and focus group discussions with community leaders. Findings suggest that over 60% of respondents reported difficulties accessing mental health care due to financial constraints and limited service availability. The study highlights significant barriers to mental health services in urban slums, particularly related to cost and accessibility. Recommendations include the development of community-based support programmes and increased government funding for mental health initiatives. Treatment effect was estimated with $\text{logit}(p_i)=\beta_0+\beta^\top X_i$, and uncertainty reported using confidence-interval based inference.