Workers at Amazon are increasing pressure on the world’s largest retailer with strikes and protests aimed at improving working conditions and wages as the company continues to fend off unionization efforts.

The unionization movement at Amazon, which has garnered worldwide attention, suffered a recent setback when it lost a vote at a warehouse outside of Albany, New York, amid numerous charges of unfair labor practices.

Read more: Amazon Workers Reject Union Bid at Warehouse in Upstate New York

But The Guardian reports Amazon workers plan to fight another union election at Amazon ONT8 warehouse in Moreno Valley, California.

In the meantime workers across the U.S. allege that the giant company is conducting a harsh crackdown on unionization activities, and they have responded with protests and strikes.

Amazon workers in Joliet, Illinois, and at other warehouses in Georgia also walked off the job on October 12 to coincide with Prime Day. Workers at an Amazon warehouse in Shakopee, Minnesota, have held at least two strikes earlier this year over poor working conditions. On October 15, workers at Amazon’s air hub in San Bernardino, California, went on strike and filed an unfair labor practice charge alleging retaliation against workers who have been organizing at the facility to petition management to increase wages and improve working conditions. The strike is the second at the facility since August.

A spokesperson for Amazon claimed the company provides great pay and benefits and denied allegations of retaliation and safety criticisms.