Manager calling on my customers after they were defined to me in the system - Strategic Account Executive Lumen Employee Review

Describe job as one where they give you a base of accounts & you're to build--base of accounts were non-existent. Didn't receive existing customers until 3 months into job & then they were ones that we had just lost business to or never could win over. Mgr also was breaking into my accounts even after they were defined to systems as mine. Worked 3 huge opportunities but they wouldn't close in early enough time for me to keep job--competitor always offering huge bonuses for business to stay with them. Went into the office every day & worked 8-10 hours per day either calling on customers or going out to meet customers--very hard to get them to allow without prior relationship.