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If I were to write it in Russian I would write
"Спасибо за информацию (or 'объяснение'). Буду иметь в виду."

"Я это учту" is also possible.

The reason I said "generally" is that in an informal setting people could break this "rule".
For example, if I can't stand ДДТ and they come to our city I could say "Только ДДТы нам тут не хватало"....

The problem with 'Группе "Чайф"...' is that it sounds official so I would write it, rather, not say. In a conversation I would decline it, after all ("Чайфу" устроили...).

Generally, names that are or look like abbreviations do not decline.
Names that consist of ordinary words decline.

There are also strange names that I myself don't know what to do with. "Чайф",...

It's a pity you haven't provided examples that confuse you. Well, let's start with this:
- Я люблю помидоры.
- Я тоже люблю помидоры. Я также люблю огурцы.

Я тоже люблю помидоры - (you like...