Placing a plaque with a short dua instead of the donor's name on a well

Q: There is great rewards in making sadqah in the form of wells. I wanted to know if on the well it is permissible to have a dua instead of the donors name. There are wells I've contributed towards, but charities insist on a donor's name. My intention was to make Allah pleased so I requested short duas on the plaques instead. So the benefactor remembers blessings. Is this permissible?

Combining salaahs due to illness

Q: Can I combine my prayers? I have a urine condition where if I go to the toilet, then after a few minutes, I feel that there is a drop of urine coming out.

Due to this condition, I try to not go to the toilet in the daytime so that I can perform my prayers, but it is a painful process to suppress your need to relieve yourself.

Can I combine my Zohr and Asr prayers and then perform the Esha prayer with Maghrib?

Selling a stolen phone

Q: I bought a phone to sell from someone but when they came to sell it while I'm paying them they say the phone is on contract and they have a way of wiping the name of the person who took the contract off from the database etc. so they don't have to pay etc.

Afterwards I realized it's like stolen so I messaged the person and told him I want to return it but he's now insisting that the contract will be paid for monthly.

What do I do? I sold the phone now, what do I do with the money from it? Is it halal for me to use or must give it away in charity?