rude consultant

I am in the market for a new phone and have considered buying a lumnia 950 from the Microsoft online store. I started the process thinking that I'll complete my purchase as soon as I have money in this week. In fact I wanted to pay then confirm or send the proof of payment rather than pay from their website. I just received from a call from one of their agents who was so rude and asked who I was without a proper greeting and demanded to know why I abandoned a cart on their website. I've never been spoken to in that manner. Their website does not have an email to contact them nor a complaints line, I suppose they believe they give great service and don't bother training their staff. This is unbelievable. I would like for someone from these people to call me to explain themselves and I can return the favor.