Constant spam calls to sign contracts whenever you buy pre-paid data

It's ridiculous how many spam phone calls from Cell C I get in a week. As soon as you buy a modicum of pre-paid data, you can guarantee you'll be harassed the next day by their tele-sales team to sign a contract.

I'm not naive to think that these companies aren't sharing my information, but it's very creepy when you receive these spam calls exactly one day after buying pre-paid data.

No I don't want your contracts. I have ZERO interest in signing any sort of contract with a company that does this. Please leave me alone.

I deeply regret this SIM card and am planning to port the number to another network in the near future.