Gulraiz Yasin, aged 27, of Elgin Street, Shelton, started working for the mobile phone giant in November, 2007. His eyesight deteriorated and he was signed off work in June 2008 and had an eye operation six months later. He now has partial sight in one eye.
The father-of-one returned to work in January 2009 and a new software system was installed on his PC in May. But it was problematic and kept crashing the computer. When it still wasn't sorted five months later Mr. Yasin became frustrated.
He told an employment tribunal in Hanley: "It was a difficult situation to deal with, I wasn't being rude or nasty, I was just concerned about my future with Vodafone.
"I was frustrated, it had passed through four managers and hadn't been resolved."
In September, 2009 Mr. Yasin was moved to be a trainer for three months while his managers worked out what to do. When his training sabbatical finished Mr. Yasin made a formal complaint about how the problem was being handled, effectively stopping any further progress because the internal grievance proceedings were launched.
He was then signed off on long-term sick due to anxiety and depression. He was invited back for a software trial in September but was unable to attend because of his health. Mr. Yasin launched tribunal proceedings because, although still an employee, he claims the conditions means he is unable to return to work there.
The tribunal heard Mr. Yasin still receives £1,050 in commission payments per month.
He also received a one-off pro rata payment of more than £3,000 commission.
When asked whether he is pursuing the tribunal for a five-figure settlement, he said: "I haven't said anything about figures, I would like this situation to be resolved and the software to do the job it is supposed to. I want to go back to work and do the job I love."
Vodafone say the first type of software could have introduced bugs to its network if it had been put on the server rather than Mr. Yasin's PC. Other software required board-level approval.
Louise McCarthy, sales manager at Vodafone, said: "I believe I was doing everything in my power to resolve the situation, you can see the amount of hoops we were jumping through but there are a lot of approvals needed.
"I wanted him back doing his job and he wanted to come back."
The tribunal will continue on December 1.
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