Don't venture into territory where you are not welcome. Although being rejected is hurtful, you should abide by someone's request to stay away. Part of you thinks if you explain your position that your position will change. This simply isn't true. The only way to earn respect is to focus on worthy projects and perform to the best of your ability. Eventually, you'll stop worrying about the impression you are making. Your successes will mount and new opportunities will become available.
Give my team of gifted psychics a call on *0906 539 1662 (150p per minute + Phone Providers access charge, 18+) or 0207 111 6154 (Credit/Debit Card payments) to hear that you need to reassess your aptitudes and abilities. There is every chance you are under-estimating and under-selling your skills and talents. So, think again.