Magellan GPS

I noticed my magellan gps was acting up so I called their customer support ph# which had a recording saying they no longer answer phone calls & said to go to their website. The website asks you to input your unit serial#; which then tells me I have defective software in my unit! I then contacted them via their customer support email and they responded by saying yes I did have defective software that was still under their warranty. However the only way they would update my unit's software is to buy an sd card that their patch could then be downloaded to an sd card that then could be downloaded to the gps unit.
I then responded
1) I don't use or have an sd card
2) my desk top computer does not even have an sd card slot
They responded that is the only way to correct their defective software is to use an sd card.
Magellan has no integraty & no viable warrenty on defective products