Hey, it doesn’t look like you were double charged.
You purchased 1,000 tokens, which you were charged correctly for and then proceeded to purchase 1 (one) client instance for 100 tokens. After this you purchased another 1,000 tokens - which again, you were charged correctly for. With your remaining 1,900 tokens you purchased 2 (two) instances of YAgility bringing you down to 300 tokens. Both purchases were a few minutes apart too, so it seems unrealistic to be a fault on our end.
Regarding your account getting banned, I am sorry to hear that and cannot offer you a refund for any bans. By using our service, you essentially agree to break jagex’s rules, which can get you banned at any time - we cannot be held responsible for this!
See more here: https://rspeer.org/resources/refund-policy/