Business ProfileforiTravel2000

I usually call into itravel2000 to book any travel plans I have but this time when I tried calling itravel2000 to book a flight they were expressing technical difficulties so I had no choice but to book the flight online. Once I selected my flight it showed me an option to upgrade my seat to premium economy for a very small fee when selecting this option and continuing the checkout process the premium economy didn’t show on my flight information. I call back to try and sort the issue and all the agencies I spoke to transferred my call to another department which I was left on hold each time between 3:30-5+ hours. All the agencies were giving me the runaround and not wanting to me resolve a simple issue. The agencies said they couldn’t change my seating and only one department handles these issues. This issue has still not been resolved I have been trying to speak to someone the past 3 days and no one is helping and I can’t even speak to a manager. The last agent that I spoke wanted to charge me more than the cost of my ticket and this is an issue Itravel2000 had on there end. They are also wanted to charge me more than the airline directly. When trying to make the change with the airline directly they were unable to make any changes due to buying the ticket with Itravel2000. This is how they treat a loyal customer that uses them for any vacation plans. I will never use Itravel2000 again. Worst customer service.