Refusing to take a bottle:(

I'm suppose to go back to work in a couple of weeks, so we've been attempting to give our sweet babe a bottle with pumped breast milk...to say she absolutely refuses it is an understatement! We've tried multiple bottles, positions, times of the day...nothing works:( I'm really starting to get worried about returning back to work because of this! She has a great latch and I absolutely love breastfeeding, but she will need to take a bottle during the day when I am gone. Any other mamas go through this? Advice? Will it get better?