Wailakem Salam,
Same happened to me i tried tape and elfi both one after another which did worked but was temporary in the end you will be needing a whole thing replaced which i would recommended doing a whole new key including a key and a remote both which for me cost around Rs 2500 for mazda carol 2008 model can't say anything about passo.
You should get the remote tested if its fixable then you will only be needing a key and a new case which will cost a lot less then the whole thing.
Shop Address: Sheikh key maker, shop no 11, shahnawaz plaza, g 11 markaz, Islamabad.