Want to find a mortgage to buy a house from a bank, which bank service should you use, which is the best and cheapest interest rate, please …

Want to find a home loan from the bank, which bank service should be used which is the best and the cheapest interest, please advise me I want to find a home package from the guarantor. Which banking service should I use and the cheapest interest rate? Please advise me.Translated from Khmer