[benguino]

Ok, I don't have anything at the moment, but I'll bring up some points that may be worth considering.

Here are the original messages:
3svgl/rhzp()gz12kmuuzs5fyeseeneymi.
-zm+bakcag-ova11ohvok5jezb3x8fzyt15cbk+kcl4xsg()wzanjgn/kwxzs()vsn13ijgnxjb.

It's been said that we don't need to worry about the non-letters or something like that, so replacing the non-letters with spaces where appropriate yields:
svgl rhzp gz kmuuzs fyeseeneymi
zm bakcag ova ohvok jezb x fzyt cbk kcl xsg wzanjgn kwxzs vsn ijgnxjb

From this, one might think that the title for example is a 4 letter word, followed by another 4 letter word, followed by a 2 letter word, followed by a 6 letter word, etc. However, there is nothing that guarantees that the spacing in the above is representative of the spacing of the words in the original message.

I strongly believe this is the case since I threw fyeseeneymi into a cryptogram solver and it seems no English word has that form (if each letter in the ciphertext corresponds to a letter in the original).

I'm hoping this is a simple substitution cipher of some sort since that's how I'm trying to tackle it at the moment. However, it may be the case that the positions of each character in the original message is used in the encryption as well. Or, it may be a simple substitution cipher, however, maybe each "block" (i.e. section separated by numbers/symbols) is encrypted differently based on those numbers/symbols.

Anyways, looking at the numbers/symbols themselves:
3 / () 12 5
- + - 11 5 3 8 15 + 4 () / () 13

Interesting to note that the number of numbers are close to the number of symbols, as if an expression is supposed to be made with them or something, idk.

EDIT: Also, "jgn" appears twice in the longer string. Also, "kc", "jg", and "gn" are digraphs that make multiple appearances.

EDIT: Also, noticed that the OP didn't properly nest their italics and bold tags. I don't know if that's of any significance.