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Customer complaints are prominent in evaluating service quality and customer satisfaction for banking sector. With the rapid growth of digitalization, banks receive a large volume of unstructured complaints, making them difficult to perform manual analysis due to inefficiency and time-consumption. This study proposes an automated framework for analyzing and classifying bank customer complaints using machine learning (ML) and deep learning (DL) techniques. A large-scale dataset consisting of 162,421 customer complaints was collected from Kaggle. After data preprocessing, several ML models, including Logistic Regression, Decision Tree, Multinomial Naïve Bayes, and Random Forest, were trained using TF-IDF features, along with a DL model as Long Short-Term Memory (LSTM). Experimental results shows that the LSTM model outperforms traditional ML models, achieving a highest classification accuracy of 96.61%. The findings indicate that credit reporting-related complaints are the most dominant, highlighting critical areas for service improvement. The proposed system provides an effective and scalable solution for automated complaint classification and can support banks in service improvement.
Keywords:
Bank Customer Complaints, Complaint Classification, Machine Learning, Deep Learning, Natural Language Processing
Cite Article:
"Bank Customer Complaint Classification Using Machine Learning and Deep Learning Models", International Journal for Research Trends and Innovation (www.ijrti.org), ISSN:2456-3315, Vol.11, Issue 2, page no.a269-a275, February-2026, Available :http://www.ijrti.org/papers/IJRTI2602034.pdf
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ISSN:
2456-3315 | IMPACT FACTOR: 8.14 Calculated By Google Scholar| ESTD YEAR: 2016
An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 8.14 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator