I created a wallet using Electrum for Windows and use the Option to "Extend this seed with custom words."  I used a word with a capital letter.

When I tried to restore this wallet using the Electrum Android app there is no way to enter capital letters, only lowercase.  Does this mean my custom seed will only work on the Windows version?

 

I also received an answer from them 17 days after first writing to them.  The email promised to refund my Bitcoins if I would provide an address.  I did so and now we will see.

When you write that you "messaged" them do you mean you submitted another "Support Ticket" or do you know another channel to communicate with them?

So how long did it take you to get an answer from Coinizy/Kardiz?

You may add me to the list of their victims.  Four days and no response from their "Support Ticket" system even though it states "24 hours".  Their "Chat with us" link is dead and non-functioning.

Coinizy/Kardiz meets all the criterion for calling this company a SCAM!

My loss does not meet the legal threshold for Felony Theft in my jurisdiction, so I am not wasting my time on them.  Others scammed out of larger sums may want to follow up on this:  Reading through their terms and conditions on www.kardiz.com I found:

"If you need assistance, you can contact the Card Support team at support@mychoicecorporate.com or contact the IVR at +44 113 320 0312."

I have received no answer from that email yet.  The phone number appears to be in the United Kingdom.

Looking at the web site mychoicecorporate.com it might appear that  Coinizy/Kardiz is reselling the services of this  My Choice Corporate, or perhaps mychoicecorporate.com now owns Coinizy/Kardiz.  Your guess is as good as mine.