This is my first question in the site, I want to make the word "Chapter" all in capital letters and put ":" in front of the chapter title. I used report document class and the only packages for TOC are \usepackage[toc,page] , \usepackage[nottoc,notlof,notlot]{tocbibind} I dont know if they are for modification or not ... i am really just a user in latex and it is my first attempt to write a thesis
\documentclass[12pt,a4paper]{report}
\usepackage{amsmath,amssymb,amsthm,amsfonts,mathrsfs}
\usepackage{graphicx,epsfig,subfig}
\usepackage{geometry}
\usepackage{setspace}
\usepackage{array}
\usepackage[toc,page]{appendix}
\usepackage[labelfont=bf]{caption}
\usepackage{xpatch}
\usepackage{fmtcount}
\renewcommand{\thechapter}{\NUMBERstring{chapter}}
\renewcommand{\thesection}{\arabic{chapter}.\arabic{section}}
\renewcommand{\thefigure}{\arabic{chapter}.\arabic{figure}}
\makeatletter
\input{fc-british.def}
\xpatchcmd{\@chapter}% <cmd>
{\numberline{\thechapter}}% <search>
{\@chapapp~\thechapter\quad}% <replace>
{}{}% <success><failure>
\makeatother
\newcolumntype{L}[1]{>
{\raggedright\let\newline\\\arraybackslash\hspace{0pt}}m{#1}}
\newcolumntype{C}[1]{>
{\centering\let\newline\\\arraybackslash\hspace{0pt}}m{#1}}
\newcolumntype{R}[1]{>
{\raggedleft\let\newline\\\arraybackslash\hspace{0pt}}m{#1}}
\usepackage{caption}
\usepackage[pagestyles]{titlesec}
\titleformat{\chapter}[display]
{\normalfont\LARGE\bfseries\centering}
{\centering\MakeUppercase{\chaptertitlename}\ \thechapter}{20pt}{\Large}
\titlespacing*{\chapter}
{0pt}{50pt}{40pt}
\geometry{verbose,a4paper,tmargin=30mm,bmargin=25mm,
lmargin=30mm,rmargin=25mm}
\renewcommand{\baselinestretch}{1.65}
\usepackage{fancyhdr}
\usepackage{psfrag}
\usepackage{array}
\usepackage{booktabs}
\usepackage{float}
\usepackage{caption}
\usepackage{multirow}
\usepackage[shortlabels]{enumitem}
\usepackage[monochrome]{xcolor}
\usepackage{pdflscape}
\usepackage[toc,page]{appendix}
\usepackage{titlesec}
\usepackage{amsmath}
\usepackage[nottoc,notlof,notlot]{tocbibind}
\renewcommand\bibname{References}
\makeatletter
\newcommand*{\rom}[1]{\expandafter\@slowromancap\romannumeral #1@}
\makeatother
\setcounter{secnumdepth}{5}
\setcounter{tocdepth}{5}
\newtheorem{theorem}{Theorem}
\newtheorem{acknowledgement}{Acknowledgement}
\newtheorem{algorithm}{Algorithm}
\newtheorem{axiom}{Axiom}
\newtheorem{case}{Case}
\newtheorem{claim}{Claim}
\newtheorem{conclusion}{Conclusion}
\newtheorem{condition}{Condition}
\newtheorem{conjecture}{Conjecture}
\newtheorem{corollary}{Corollary}
\newtheorem{criterion}{Criterion}
\newtheorem{definition}{Definition}
\newtheorem{example}{Example}
\newtheorem{exercise}{Exercise}
\newtheorem{lemma}{Lemma}
\newtheorem{notation}{Notation}
\newtheorem{problem}{Problem}
\newtheorem{proposition}{Proposition}
\newtheorem{remark}{Remark}
\newtheorem{solution}{Solution}
\newtheorem{summary}{Summary}
\numberwithin{equation}{chapter}
\numberwithin{theorem}{chapter}
\fancypagestyle{plain}{%
\fancyhf{} % clear all header and footer fields
\fancyfoot[C]{\bfseries\large\thepage} % except the center
\renewcommand{\headrulewidth}{0pt}
\renewcommand{\footrulewidth}{0pt}}
\begin{document}
\addcontentsline{toc}{chapter}{Contents}
\tableofcontents
\chapter{General Introduction}\label{chapter:Intro}
\section{Introduction}
Composite steel-concrete construction
\end{document}