you can check if your requirements meet with this.https://www.amazon.ca/Asus-ZE520KL-Sapphire-5-2-inch-International/dp/B01IB9H9MS/ref=pd_lpo_sbs_107_t_0?_encoding=UTF8&psc=1&refRID=VPTAB4WQT8HEQZHJKYYT
Asus Zenfone series are also good. So far it is working perfectly for me. I am using Asus Zenfone 3. Nut now Zenfone 5 is available in the market. it may be a little bit over than your budget but worthy.
If it is same number that you are getting calls then just block that number in your phone. I had same issue and do not to change number. This help me for now..i had to block almost three numbers.