AK3631LQ14402 Anyka can't hold more than about 400 songs, 32GB
 

I've recently bought a 32GB touch mp3 player on ebay and I'm having a hard time trying to make it working correctly. First time, I transfered 30gb of songs in the mp3. When I opened it, it took a while to get to the artist menu and then most of my bands disappeared. 30Gb of space was used but only 2GB were located in the player. I had to formate it.

I tried to copy only a few albums at the time and start the mp3, then I realized after about 400 songs, the mp3 delete the other songs but keep the space used.

Is there a way to solve this problem?

you have fake memory use this and find its real capacity Download H2testw - Test hacked flash memory - MyMPx

You are right about fake memory, I've tested it.
I had about 2.5Gb of music inside the mp3 when i made the test.

Warning: Only 28989 of 31992 MByte tested.
The media is likely to be defective.
228 KByte OK (456 sectors)
28.3 GByte DATA LOST (59369016 sectors)
Details:24.7 GByte overwritten (51953368 sectors)
0 KByte slightly changed (< 8 bit/sector, 0 sectors)
3.5 GByte corrupted (7415648 sectors)
64 KByte aliased memory (128 sectors)
First error at offset: 0x0000000000000000
Expected: 0x0000000000000000
Found: 0x88503a5043425355
H2testw version 1.3
Writing speed: 4.66 MByte/s
Reading speed: 22.7 MByte/s
H2testw v1.4

What should I do now? Should I get my money back?

Hell yeah! Tell them you want 75% back and this is outrageous tell them if you don't refund my money I will open a dispute with you and ebay and give you a negative feedback.
PS if you spent over 40 ignore the 75% and say you want x,total the amount you spent -10 dollars because a mp4 with 2gb is just 10 dollars maybe less