Partition problem


My problem is that i want to partition back my sd card to default 1 partition, what i used for runing osmc before, but i cant do in windows, or linux. I tried diskpart, parted, gparted, all failed, the partitions still there after i deleted them. What is the trick? Can someone give me a working guide for that?
Thanks, Gergely!

This sounds to me that the SD Card is broken (it went into RO mode) so nothing you can do there.

Thanks, then i not try again and again

Iā€™d give it one last try using SD Memory Card Formatter | SD Association - however if that fails then I would consider the card dead.